The Slate truck looks interesting and is exactly what you describe. Time will tell if it pans out.

Multiple backup computers. In fact I’m a bit peeved my oldest backup computer broke.

I use hpux everyday. Mostly it still runs what it needs to run and the hardware for the most part is a tank so you don’t have to think about it.

When it breaks it’s the most infuriating thing in the world. All the hardware is bespoke and obsolete, old unix is maddening coming from modern Linux, it’s a nightmare but kind of fun at the same time. My only hope that HP will open source it at the end of the year.