Thanks guys. I understand the point. I have learned something. In my case I’m in no danger as the individual points happen not to apply to me in my particular circumstances - reasons such as: very low load, no desktop pc on that ups for one point.
I would put any other kit that is not core network infrastructure, such as a PC, on a different UPS anyway, to maximise runtime. But in any case various PCs are now packed away as I can’t use them any more, and like me my wife has also been completely 100% won over from her desktop PC to her iPad anyway.