Excuse me but as both a hobbyist and commercial software developer I say that the gpl (any version) is quite simple enough. There is no need to go all the way to bsd/mit just to get safety and clarity and freedom from encumberance.

The only people who avoid gpl and talk about mit as being the only safe option, are exactly the people no one should care about. They are the people for whom free isn't free enough, and they must steal even when it's already free.

That is not "adoption" anyone needs to care about.