one of my favourite things when i switched to linux first was using the meta+Q hotkey to shutdown a program (this was with PopOS i think). with windows there is alt+F4 but some programs only use shift+alt+F4 which makes it a lot more confusing. on top of all that if youre using a laptop then its another keypress for the Fn key in some cases
KDE Connect. its an app that lets you share lots of different things between your devices, and it does this over your home network without needing any “cloud”