I am surprised.
I didn't think Horford had it in him to be a power forward any more. That was mostly based upon his time in Philly, which didn't work out. Was that just incompetent coaching? Obviously, you're not going to maximize Horford's talents on a team that has Embiid, Simmons and Harris, but he shouldn't have looked as bad as he did.
I do think that our future after Horford will probably involve a stretch four rather than a traditional PF. I'm hoping the team doesn't try to go with a Theis / Timelord starting lineup if Horford departs. But, for this season the two big lineup has been excellent in a way that I definitely wasn't expecting.