You can have an OS running and not have it 100% stable for long term with small latent bugs. I've actually got a prototype board I'm working on right now that

You can have an OS running and not have it 100% stable for long term with small latent bugs. I've actually got a prototype board I'm working on right now that runs Linux just fine but will lock up and need to be rebooted every few days. But as you said, for 20 quid who cares?