Several reboots later, I'm running plasma on Fedora 40, with gnome bits removed. Everything is really weird, but the system needs only two gigs of memory after booting to the desktop. That is nice!
@that_leaflet@zygoon sounds a bit high to me. With a couple of plasmoids and some extra services running I'm at 1.6 after a reboot. Regardless, I think KDE has been less memore hungry than Gnome for a while now.
@zygoon there are a few easy things you can do to reduce consumption. Indexing is one although with large number of file is a great feature. The other one is akonadi, if you do not use KDE PIM apps