I wonder if gyms are gonna start figuring out that training wrestlers/grapplers to work for TD's the way Khabib does is the counter to the fact that everyone uses the guillotine as the counter to traditional level changes? The guillotine is arguably the easiest submission to lock in, and even when it's not locked up, it is proving extremely effective as a way to simply defend the TD. It puts the fighter shooting on the defensive, you can't just give up your neck and let it be locked in or...you may end like Pena just did. This is esp true because it's not like you've rolled with your opponent a zillion times and know what their squeeze is like.
I know everyone can't be Khabib, but rarely is he leaving his neck exposed when he's taking guys down. He did vs Dustin, but that's the exception. Most of the time he's working toward the body lock and dragging the opponent down.
It's not like you can't ever shoot single or doubles, but timing them off a missed strike is when they take the guillotine out of play. When you are clinched up and then level change like Pena did, it's almost instinctual now that that the opponent is hunting your neck. And that's a dangerous game to play unless you are just a brilliant grappler that knows exactly what your positioning needs to be every nanosecond of the exchange. And there's not a ton of fighters at that elite level. Yeah Mackenzie Dern or Kron Gracie probably don't need to worry about it, but they are the exception, not the rule.