I'm absolutely certain Lara is on its way out. Belleza too. They are still in use but less and less is being made for it, new stuff is often exclusive to the Kupra, legacy or Ebody, and it feels very similar to where Slink was when I desperately clung to it. Yes, it was common. Yes it was everywhere. No, it was not doing well.
A good example of why the raw 'avatar' numbers shouldn't say much about the health of a body is to eye how, combining all the various kemono-versions/mods, there's more kemono than Legacy. Kemono however has been abandoned for about two years by almost everyone, and even the former dedicated Kemono brands have swapped to other bodies. Lara's not that far yet, but just looking around any sim I'm in, I can count bodies. In two years Snaggletooth, kemono, slink and belleza have almost disappeared with only a few Freyas holding on. Maitreya has gone from super-dominant at almost 90% of the population to, I'm reasonably sure less than half. Mostly I'm seeing it on boys using it for femme mods.