It's not that anyone on this board is actually "forgetting Matisse." Okay, maybe some people do see him as an afterthought given recent injuries and other variables.
He's a known quantity as a backup. He's a given and will earn his minutes ... assuming health.
How many minutes he gets at SG/SF will be determined by players who don't claim minutes that they should or could.
Grant doesn't play well, again, and Cronin trades him to the Lakers for expiring contracts of backups and a couple 2nd rounders? Unlikely.
Scoot only gets 16-18 pure backup minutes behind Jrue who then only plays PG?
And Sharpe is just okay at the 2, so more minutes there?
If the above happens, forget the play-in. Break glass, play Matisse to the maximum.
Or only some of the above happens and Matisse gets closer to starter minutes. [Prertty unlikely on 26-28 minutes, IMHO]
He is Chauncy's just-in-case guy to plug him in and make a higher ceiling (or just better) player sit until they pull their heads out.
The minutes Matisse plays corresponds to the chance he is traded by February.