Because TMP is very difficult to get their kits for, IIRC, and the body itself is very...limited. Since they're restricted to ONLY TMP stuff. No omega support, nothing else like that.

well clothes dont need omega support, and the clothes I have found that are tmp compatible are great

But skins do require appliers , and if TMP won't support skins other than their own or a very select few....then you can see the problem starting

Plus, from what I've seen, TMP is rigged slightly more forward than standard? Compared to Maitreya or Slink, for example. Even without slink/maitreya I can still wear their stuff often

But 100% of the time anything I wear that's rigged for TMP will not fit my av without cutting into the neck

(Example being: Looks great from the front, but doesn't work with the back)