I think Simmons is coming along faster than anyone (coaches included) thought he might. His athleticism is elite, so even if skillwise he wasn't quite there, he was going to be able to make athletic plays. Luckily, his skills have been improving too, he's handling the ball better, he's avoiding traps or going into them aware of where guys are (that pass to Bonner last night?!!!). He has been shooting the 3 without hesitation and making a good %, and he can keep in front of guys. He still needs to be careful not to foul too much, bc of his energy (although he has terrific body control for a guy with such springs), but some calls against him were also 50/50. He has frankly looked like between these games and the playoffs he'll be fine.
He's ahead of Anderson in the rotation, so he's prioritized. Pop is still going to play Anderson though, not ahead of him or in close games maybe, but those who don't want to see him at all will be disappointed, bc Pop is developing him and likely, he and Simmons will be a bench tandem when Manu retires.
For GSW, I only see Simmons playing. We'll need minutes from a 4th wing to give Manu a breather and Danny is so limited. I don't see Anderson in the playoffs. Pop has only played him lately against the weaker teams, and he's clearly still improving and developing, but minutes for him are limited anyways by virtue of needing to prioritize Simmons and he won't see minutes against tough compe ion and playoff teams, therefore he won't be ready.
I keep thinking the same thing about Boban, although his minutes need to come from somewhere else and he's not affected by the wing rotation situation. If Pop doesn't play him for a few minutes against elite teams it is difficult to see him in the playoffs bc Pop won't trust him. So right now, maybe Boban and Anderson are really being developed for next season, and Simmons will see some action in the playoffs more out of necessity for some minutes.