Yep even mid range ones did so way back in the early 90s. It was a common fairly cheap feature that used rs232 mostly. In those days non unix systems did not care as much if powered down without warning. So us early (me 1996) Linux users really found it useful to have the ups initiate shutdown before it died. Windows users of the time only tended to worry if they had the PC running when not sat their. Few had internet at home in the early 90s and those that did were dil up. So for many it was not worth the cost when you could just turn off the PC if a power cut was long term.
Now with most people using laptops for casual use. I really cant imagin anyone buying one without the feature.
Agreed; I have two Cyberpowers that NUTS works well with. That said, I hate configuring NUTS. It's like the sendmail of power supply management systems. I'm not aware of any others, though, so it's what there is.
Oh, and Home Assistant plays really well with NUTS!
I agree, configuration is text files like good old sendmail, what a nightmare memory, IIRC there was even books about configuring sendmail...
Anyway NUTS works well, at one time I even installed it on my ASUS router and set it as a IP server, and from a windows PC using winNUT I was able to see it.