The center position is an endangered species in the NBA. The Houston Rockets have almost completely gotten rid of the position and are playing five small guys together all the time. (I feel compelled to mention that every player Houston puts on the floor is still a large human, just not in relativity to many other NBA players.)
That isn’t to say that centers are irrelevant. The Rockets have been winning games, but I don’t see that holding up in the playoffs. Their lack of size will catch up to them. There are too many insanely good centers they’ll have to go through (see Nikola Jokic, Rudy Gobert, kind of Anthony Davis, kind of Giannis Antetokounmpo and Joel Embiid).