I use T-Max 100 film almost exclusively for slower speed and always develop in TMax dev. Love the results. On the other hand, I don't use 100 speed films often, so my bottle of TMax dev has been sitting on the shelf for a while. Tri-X is my usual film and I don't really like how it looks in TMax dev, few times I tried it, the grain was so prominent to the point that the results were unusable. But then I could have screwed up in agitation.