It's generally how it works, I'm sure there are exceptions, but we have seen plenty of athletes/people take steroids, then stop taking steroids, usually when they stop they are worse than they were before.
Yes generally.
Just like generally if you take Tylenol it will help with headaches. Then again you could just do serious damage to your kidney even when taking recommended adult doses and the relief you have from headaches could be minimal. Perhaps Advil will work better for you while also not being as bad on your kidney. Genetics.
This isn't 50 years ago. Today athletes don't all take cookie cutter PEDs. Well some poor stupid ones do. But not if they have a competent team behind them. They will be taking genetically identical Testosterone and their blood work and other tests on their genetics will help indicate which PEDs they will likely have good results with and which to avoid due to genetic markers. Obviously until they get on cycles nobody can say for certain what will happen in the short, mid to long term.
This is going to be ridiculously more easy with gene modification. Although we don't know the negative side effects that may befall those that fuck with nature. Not for decades to come.
PEDs no longer working for athletes also happens. That could explain certain athletes dramatic fall off. What they could safely take that doesn't have long detection time could simply stop working or side effects appear where they may have no choice but to stop.
So yes generally things work one way. But you cannot apply that to any specific athlete with certainty without knowing their entire medical history and nobody is going offer that shit up. Maybe if it comes out of a court case where they are forced to provide it.
My personal take is someone is going to get killed in the UFC eventually and if money can't buy the authorities off they are going to pull everything on that athlete, their opponent, both of their gyms, every hanger on and coach, their coach's pet dog and pull everything apart like warm bread. I don't think they will touch USADA because of the Olympics. Not because they give a shit about the dead athlete but because of the corruption surrounding boxing. They want MMA gone and it would be the perfect excuse to throw not just the book but the whole goddamn library on it so it goes away, they hope, for good. That's probably the only way we will ever find out 100% about anybody.