Nowhere as near as simple as that. It has relatively little in common with Tri-X Pan. You'd understand the difference if you researched the other applications it was designed for. Some of those technical applications have since gone over to industrial digital alternatives; but the lions share of TMY sheet film still seems to go to dedicated industrial rather than ordinary use. It has special spectral qualities not apparent to general photographers. It was intended to replace Tech Pan for certain forensic applications, replace Super XX for color separation use, and had certain critical astronomical uses as well, which is why it was once offered in glass plates. The shadow separation is the best of any film currently on the market. The only exception would be Fortepan 200, if that film had decent recip characteristics, which it doesn't, could handle a range of gammas like Super XX and Bergger 200, but it cant; and to boot, the quality control is dicey. TMax films are exceptionally predictable batch to batch. This is vital to technical applications, which still factor, even if this kind of forum is not typically the kind of place to discuss such things. Highlights are easy to control if you know how, although the current version of TMX is superior in that respect to the original. The problem is that people tend to overexpose it rather than trust the straight line going further down into the shadows than most other films. I can give strong arguments as well as the experience of hundreds of prints of high contrast desert and high altitude situations which prove TMax films handle high contrast much better than any other films currently in production. I have large bodies of work based on that very premise; I've been printing such things this very week. But if you are implying it was intended to replace TXP because it has a wider range (without needing to resort to minus of compensating dev, which would compress the midtones), that was evidently the case. But the old school TXP had enough stubborn following to keep it alive, while the "all-toe" Plus X sheet film (different from the roll film version) ironically got knocked off its log, like an old turtle. But all kinds of things factor into marketing decisions. I'm glad TMax is still alive in both speeds, in multiple formats. I would be very hard to replace in my case. There are numerous other films I know how to use well for general photography, but TMX 100 is invaluable for lab roles like color film masking and color separation negatives that would be clumsy at best with other films. And what film can you think of other than TMY400 that gives very fine grain at true box speed like that, a great asset to shooting in windy conditions or handheld with small formats?