I've been reading the opposite, or more precisely that UE5 can work with a broader spectrum of hardware capabilities. Would have to do some digging for the sources of these claims, though, can't remember at once where that article was. I think in the end it depends mostly on what the developer wants to make accessible to the user. In principle you can go as far down as pure wire mesh, the Second Life client used to have this possibility in its advanced settings. Some Entropia players use safe mode for competitions, looks be damned when only speed counts. And maybe the times also call for increased awareness of electricity consumption, which means questions about the lower end aren't only coming from poor people anymore.