I'm really worried about the state of GTA 6 if and when it ever comes out. It's all about money and not the games for Rockstar now and it's been that way for some time.
Buying GTA 6 or not, for me, depends solely on one single factor. Is the singleplayer experience worth the price?
As far as I'm concerned, the multiplayer doesn't exist. But if the singleplayer game is great, I'm not going to deprive myself of it to make a point. Good AAA games are hard to come by nowadays.