Great research, thanks!
It has been years since I've tried DASH, and it worked for me for my use case: remote power control and SoL-like serial console access. The DASH Linux tools at the time were super limited and pretty buggy, and I haven't touched Windows for 15+ years, not intending to. Hard to tell if the situation improved in any way, I guess there's only one way to find out ;)
Can you just get one of those desktops and evaluate it? I guess you could return it if it turns really bad.
Note that I only tried DASH using wired Etherenet, at the time I experimented with it the wifi was not even supported. Well, according to the PDF you linked it seems to be supported now, but it should not be an issue for a desktop.
Anyways, good luck trying it out, I am honestly looking forward to hear back about your experience.
Don't event need to read further than 2nd sentence...
How many times have we seen this already?
Dude. Replace. Your. Cable.