Power forward and center are somewhat interchangeable, but Bagley doesn't have the muscular build to bang guys around in the post on defense like Bam does. Bagley is quick, he can handle the ball, he has a good looking jumper that needs to fall, but it looks good, and he's not lost defending on the perimeter. Combine this with not having the beef to spend 30 minutes a game tussling in the paint with an Embiid or an Ayton and I think he's best used switching between the two positions as lineups dictate, and generally better at the 4. Yes, Bagley has an offensive post game that fits in with a more traditional center look, but my bottom line is that I would prefer not having to go excessively small (e.g. Barnes at the 4) for long stretches if we don't have to. I know we're going to want to run, and it helps to have at least 4 fleet players out there to do that, but Bagley has the speed to do it from the 4, and if we go with primarily Whiteside/Holmes at the 5, we'll still be able to run 4 without sacrificing size at the PF.