He's played 46 and 31% of C, respectively, the past 2 seasons. The number will inevitably go up some, but the bigger shift won't be in the designation, but in one big lineups. Last season, he played 89% of his minutes next to a true big. With his knees feeling better (for now, at least) and him appearing to be in better shape, hopefully his defensive rebounding bounces back to '12-'16 levels.
A lot has changed in the past 2 seasons, to the point where he's probably aware and accepts, that he's going to be playing plenty of C for the remainder of his career. He'll probably always chafe if referred to as one though.
Been saying pretty much this for a while.
In reality though, the only projected starting lineups where Aldridge would be more suited to start at PF are: Cavaliers, Clippers, Timberwolves, Knicks, Pelicans, Kings, Raptors, Jazz.