Nice to see unclutter getting a mention. I’ve used it for over a quarter century and I don’t think the code has really changed in all that time.
NUCs always seem a bit expensive for what they are. Not even where I work do they bother with wall-mounted displays for system monitoring though they do have some in kitchens for dull corporate news. We tried grafana and it all seemed a lot of effort for pretty but mostly meaningless graphs. icinga does the job we need.
That sounds like it was really fun to work on! I am astonished to see that we have to have so much power to do seemingly so little.