Again, the question is not about cross training. Pure BJJ as a base vs pure Judo.
I'm not talking about cross-training.
Since you don't seem to understand what I'm saying, I'm going to break it down for you:
In Bjj there is No-gi competition, so a lot of Bjj schools offer No-gi. I went to a "traditional" Gracie academy and even they offered multiple no-gi classes. Some schools of Bjj like 10th planet are entirely no-gi. No-gi competition forces you to adapt your grips to someone not wearing a gi. No-gi makes things move a lot more quickly, alters the guard game, the standing game, the transition game, pretty much all aspects of your game. This not only translates to MMA, but it also translates to wrestling, because you have to use wrestling takedowns and grips in order to compete effectively. Thus when you need to learn wrestling, your background in no-gi will help with the transition, because you're already used to the grips, takedowns, and speed of grappling without a gi.
That's strike one against Judo.
Secondly, Judo lacks the ground game necessary to be competitive in MMA. Judo newaza while sufficient for Judo competition, is neutered by its ruleset. In MMA you're not going to be stood up after a few seconds on the ground. Your Guard and escapes are going to be substandard because you were trained to turtle up to avoid too much ground fighting. You're not going to be hunting for back takes, or even understand how to take the back when the opportunity arises. You're not going to be able to perform, or defend the leg lock. You're not going to know what to do when someone is on top GNPing in the face, and vice versa you're not going know how to move to a mount position because you were never trained positional hierarchy which is drilled into MMA competitors (and comes from Bjj).
That's strike two against Judo.
Finally, modern Judo isn't too keen on you bringing in outside influences into the dojo. You know that cool takedown from the single leg you saw on UFC fight night? Yeah, you're not going to be allowed to do that move while training. You're definitely not going to be allowed to do that move in competition. That wild new Bjj guard that transitions directly into a leg lock? Yeah, you're not allowed to do that either. Meanwhile, Bjj allows everything, and is an open lab for you to experiment and adopt new methods to your ground and standing game. You're going to know how to do and to stop single and double leg takedowns. You're going to know how to do and to stop leg-locks. You're going to be free to do joint locks that attack multiple joints. You're going to be free to do guillotines. You're going to be free to come up with crazy new tactics and variations that make your game your own. In short, Bjj doesn't limit your grappling, so in the end you become a more well-rounded grappler, making your transition to MMA a lot easier.
That's strike three against Judo.
I hope that helps.
We all know BJJ has no choice but to try to ride the coatails of wrestlers to make up for the horrible levels of takedown ability. "A Wrestler trained in BJJ beats Judo". An opinion with some merit maybe but thats not the discussion.
Quick question: If Judo was so much better than Bjj, why aren't Olympic-level or high-level Judokas tearing through the major world Bjj championships? High level Bjj practitioners can't do it in Judo because the restrictive rules hinder their ability to win. However, in Bjj competition, no rules hinder a Judoka's ability to dominate. So what's the problem?
And wrestling does not replace Judo, it is a different system with different mechanics they have their place but obviously no gi changes things.
Uh, wrestling absolutely replaces Judo. If your goal is MMA and you have years of Bjj experience, why the hell would you go to Judo over Wrestling? If you've been doing no-gi BJJ for years, wrestling is going to feel natural for you, and your progress is going to go very quickly. Wrestling grips are more suitable for MMA, and training via wrestling will give you a lot more takedowns and transitions to apply directly into your ground game. Frankly, Judo would actually HINDER your progress into MMA.
Conversely, if you're a wrestler looking to enter MMA why the hell would you go to Judo over Bjj? Bjj will allow you to perform your wrestling takedowns, and your wrestling experience will be embraced by your Bjj gym and your progress will again go very quickly. You'll also have an immediate competitive outlet with no-gi Bjj. Re-learning your entire stand-up game to obtain a couple of Judo throws that you're going to have to modify anyway seems counter-intuitive and a waste of time. Also you'd be insane to believe that Judo does newaza better than Bjj (which is why you're cross-training in the first place).
In both cases you have zero reason to do Judo over Wrestling and Bjj, which are the standards of grappling in MMA.
So your saying that it is better to be a pure sport BJJ blackbelt who excels at ground game but has no takedown ability or defence when he starts to cross train.
He then has to learn wresting and standing grappling pretty much from scratch which is not easy at all. He also generally has poor athletecism compared to a Judoka.
The very premise of your statement is nonsense. I have yet to meet a Bjj blackbelt that has ZERO takedown ability and especially takedown defense. What the hell are you smoking man?