I seriously don’t know what you’re talking about with statements like :
“it’s not a game mod, I’m afraid you’ll have to use Blender/Max/Maya/C4D/etc just like for any other Game Engine”
What’s not a game mod? “Any other game engine”? I’ve just shown you a bunch of recent games on other engines that used BSP, and pointed out that having BSP editing tools demonstrably doesn’t need to have a significant performance hit on an engine, see probuilder/other engines that have it. what are you talking about