Coming as I do from a Poser background, poly count is important only because of the limitation Poser appears to have with high-poly figures. I've been working a lot more in Blender these days, and scene polys can easily end up being triple that to a typical Poser scene without Blender batting an eye: the limitation seems to be more texture size, particularly if you use Cycles (render engine - uses the GPU) and then, the limitation is imposed by the card's RAM, not by the app itself. Otherwise, if you're happy to use the CPU and wait a bit, it'll render just fine.

I'm glad to see you using quads... I think they deform better (although actually all quads are paired-tris to the program) and thus render better, and not just in Poser.

Monterey/Mint21.x/Win10 - Blender3.x - PP11.3(cm) - Musescore3.6.2

Wir sind gewohnt, daß die Menschen verhöhnen was sie nicht verstehen
[it is clear that humans have contempt for that which they do not understand] 

Metaphor of Chooks