I wasn't even planning on watching it due to the negative reviews I have seen. But after the last episode of Luke Cage, S1, Netflix went right into S2, ep 1, and it showed him (obviously), out of prison. So I figured I had to watch the next shows in order to eventually find out what happens to Luke.
My understanding is that it goes: Iron Fist, s.1 > Defenders > Punisher, s. 1 > Jessica Jones, s.2 > Luke Cage, s.2.
So I have a bunch of shows I have to watch before I continue with Shaft...er, I mean, Luke Cage.