I’d say Windows 7 was last that was relatively normal, even though I was all in for Linux even then. It had fairly coherent UI, wasn’t crazy about adverts, it didn’t feel like 10 layers glued on top of an old OS so that it could make impression that it’s contemporary. It also didn’t try to be anything but desktop OS









KDE Connect can transfer files over WiFi, it’s likely preinstalled on anything with KDE Plasma (eg SteamOS has it by default in the desktop mode), but it can also work with GNOME with the gsconnect extension. There’s also LocalSend, Syncthing and probably many more