This is actually how I do things when working on remote machines. I have far too many monitors, so dedicating on of them to a handful of btop/nvtop terminals works pretty well.
I admit that it’s a less than perfect setup though, and a single program which could handle the remote connections internally and display an aggregate would be nice.
It is a very popular Single Board Computer, with a lot of community support that allows people to build and program a variety of things for a low price. Think of it like lego, but for things which can be useful as well as fun.
Want to run a weather station? Pi and a couple of off the shelf sensors, done.
Want to control your lights or appliances from your phone without getting out of bed? Pi and a couple of off the shelf relays, done.
Want to build a retro gaming console? Pi, a couple of off the shelf controllers and some pre-made emulators, done.
smartmontools has some good functionality for interfacing with SMART via usb bridges that do not provide native functionality.