This is the same kind of short-sighted programmer selfishness that leads to idiotic ideas like "let's abolish time zones and just everyone use UTC". Do you realize how many man-years of other people's time and effort you're proposing to spend adding zero value to that software?
I sort of think that if just the top 100 plugins would be compatible, the authors of the non-top100 plugins would be motivated to migrate, as a sort of herd mentality thing.