If the starting lineup is Kyrie, Smart, Morris, Tatum and Horford, we'd be looking at a 2nd unit of Rozier, Brown, Hayward and Baynes (with Theis, Semi, Williams, Yabu...). Of course, the starters mix in, but, the talent balance of starters to bench would be pretty impressive.
How many NBA games (presuming an average bench), does a starting unit of TR, JB, GH, Theis/Semi and Baynes win? In the East, maybe 30 wins -- silly speculation, but illustrative of the talent on this team.