TwoSix
Magic 8-ball says "Not Encouraging"
I'd say that one of the side benefits of 5e's relative light mechanical release schedule is that it takes minimal to no investment to stay "in" 5e.Now that's an interesting question: does 5e in fact retain a lot of its players, or is WotC simply very good at drawing in new players to replace those who are cycling out?
I'm actively pushing a few non-5e games for a few of my tables, but I'm still plenty involved with 5e, even if I haven't made a lot of purchases lately.