I have a very cool Core 2 Duo laptop here that runs Linux Mint.
And it is pretty aweful. Would love to put Fedora Kinoite (Atomic KDE) on there, manual upgrades on shutdown, minimal set of apps.
But I dont know how well Plasma works on such old hardware. It is pretty bloated and messy sometimes, Dolphin and plasmashell are my biggest worries (the whole panel and widget stuff is sooo complex).
Has anyone tried Plasma?
An alternative would be LXQt with KWin once 6.1 comes out and it has full Wayland support.
I observed that the first boot of a new plasma install is quite slow, so that you wonder if it was a good idea to install plasma. But once everything is up, it will be surprisingly fast from that on, and it stays that fast after reboot. So, be patient you fire it up the first time …