Ask HN: What do you run on a $5 VPS that's worth keeping online 24/7?

DHH's "AI shed" idea got me thinking about getting a small $5–10/month VPS.

I'm a Linux guy and have on many points of my life have a personal server. So I like the idea of having something always on, but I’m not sure the maintenance is worth it when most things can just run on my laptop.

That said, I tend to do things myself and only later realize I could have automated or delegated them, so I may have a blind spot here.

If you have a cheap VPS or mini PC, what actually ended up being useful long-term? Anything that saved enough time or replaced enough subscriptions to justify keeping it around?