one thing to bare in mind is that Plagueis was successful in his goal to have everlasting life. He figured out how to reverse his aging back to his prime and how to rapidly re-generate from injuries. He even figured out how to use the force to just instantly kill his enemies
It wouldn't be too much of a stretch to believe he was expecting palps to kill him soon and would have some sort of contingency plan to go into hiding for awhile and gather up a power base to fight his old apprentice. And then waited for the empire his apprentice created to fall before trying to take over the galaxy with the power base he built up
from what I understand, force-sensitive children were hunted down and killed once the empire took over, if they were old enough, the empire would try to make them inquisitors, where many of them would die from the training, a lot of the training was fights to the death to see which new recruits were the strongest. and of course anyone who wasn't evil enough was killed
There weren't a whole lot of jedi to make a new generation of jedi after order 66
what really fucked starwars is the people disney put in charge of it
everyone involved with the disney stuff can't stop inserting all their own psychosis and narcissism into it and it ruined starwars. They want the twilight and 50 shades audience, but they're not going to get that if they work with starwars, so the audience they have hates it, rightfully so, because it's not real starwars
hiring actual starwars fans, who read all the books and comics and played all the games from before disney would massively improve starwars, re-canonize the EU of starwars and just make 1 to 1 recreations of the scenes from the books and comics. No real world politics crammed into it, just a fantasy sci-fi WW2 in space ...because that's what made it successful don't try to fix what isn't broken
if they just did that, starwars would've been disney's most profitable franchise, but they kept hiring all the worst possible people to work with that material instead
One theory for awhile, before disney fumbled the ball on Rey's origin...was that she was Obi-wan's Granddaughter and that snoke was Plagueis...but because disney sucks, we didn't get to have any fun
that's what cats do