Well the detailed assets weren't modeled, they are 3D scans of real objects (photogrammetry). That is why the poly count is massive. Godot 4.0 has auto LOD so this would help, it would have been too much work to do the retopo myself (and probably ruin the graphics).
I used to have a 750 Ti, it was a solid card a few years back. Think it might still be in the closet somewhere, I did love that card. Never used it seriously, but when I built this crazy computer, the card I wanted wasn't out so I got that for like a few months to hold me over. At 1080p it was actually way better than I thought. But that was several years ago.
