I read a piece many years ago by John Sexton on TMAX films, and he said something to the effect of "after using TMAX films for two years now, I am beginning to get intimately aware" of the emulsion. It's so true. We think we can do a roll here and a roll there and get some consistency in our work. Great artists know their materials, their strengths and limitations, and they max them out.
That being said, I periodically switch from TMAX to HP5, but still use Diafine. No one can tell the difference. I can't even tell the difference. So I think the endless obsession with film and developers is a bit overdone. Ansel used TriX. Avedon used TriX. Callahan used TriX. Salgado used TriX. etc. Does their work look at all alike?
I've been using ID11 exclusively, initially as it was the only dev stocked locally but I'm sticking with it for a while before I start experimenting with others, besides Acros comes up so nicely in it!