I mentioned this in the game thread, Joe gets a lot of stick for his flaws and rightfully so but one thing I've been impressed with him with is his ability to get players to buy into his vision and play hard for him. We talk about tactics and timeouts and subs and all that tactical stuff but he has a whole staff to help him with that (I hope he's using them). I feel like his primary, and most important, role as head Coach is to make sure everyone is aligned and pulling in the same direction, with the same goal, with personal agendas subordinated to the overall goal, and to make sure everyone that plays adopts the team culture, sacrifices if needed, and he's definitely done that.
Compare that with Philly where even taking into account Embiid being in and out of the lineup, they have players that are all chasing their own agendas, some are stat padding so they can get paid, some are trying to get traded so they can get paid, some are trying to get scoring titles and nobody seems to be aligned and prepared to sacrifice. Their ream has definite Celtics 2018-19 vibes.