@Natanox I should add: Atm. i don't need new hardware and PIs are way to expensive right now for my taste. I only use one PI4 right now. There is another Pi3 on a 3d printer that i barely use. And i still have Pi1 and Pi Zero W laying around.
But they actually could do stuff, while my Odroid and cubox does not have a use case due to lack of updates.
Imo: Better reuse a thin client for a few bugs and handle hardware stuff over a micro controllers.