Back in April of this year, as I mentioned previously, I bought myself a new Minisforum UM250 small-form-factor PC. The experiment with using it with Arch and/or Manjaro proved less than successful -so I reverted back to my vintage 2012 PC and retired the UM250 back to its box, in which it has sat ever since, on one of the bookshelves in my study.
Around June of this year (I think), I happened to be laid up in bed (after one of my Covid-19 vaccine shots) and was thus using an old laptop for browsing the web. It was a 2016-vintage Dell of some bog-standard sort. But way-back-when, I had installed multiple operating systems on it, so I could boot into Windows 10, Ubuntu 18.x and Manjaro as and when I chose... and I happened to notice that the laptop's fan noise was considerably worse when booted into Manjaro than it was if I booted into Ubuntu. I can't remember if it was any worse or better in Windows, but it struck me at the time that in the presence of laptop-style hardware, Ubuntu seemed to have a better lid on thermal management than Manjaro did. I don't know if that's actually true or not -or, if it is, why that might be. But if made me think that if I had conducted my earlier Minisforum experiment with Ubuntu (or one of its derivative flavours) rather than with Arch or Manjaro, maybe it would have run more quietly too, and thus the outcome might have been happier all round. [...]