Well, I mainly mean that they’d need to put in quite a lot of work to make the existing Oblivion mods work with it or to develop a new modding API. I doubt, they’d put that much work in for a cash grab remaster/remake.

I mean, I have heard of some weird constructs before, where games used their own engine for physics and whatnot, and only used Unreal for rendering. If that makes sense for them to do, that would preserve support for most mods.