I have no practical experience with OH, so cannot comment on the 1st point. However if I only want to set and forget, then the rest is pretty much irrelevant. I'd say HA is great for people who like to tinker and have a lot of time (and don't mind fixing broken things constantly).
my experience with HA is very much the same, and I am also tired of baby-sitting HA. Last time it broke I didn't have time to fix and think maybe investment into OH will not be wasted. I'd like to set and forget, not to spend my time to assist something that is supposed to make my life easier.
my current setup consists of 2x imac27 retina sitting next to each other. I use Barrier (a software KVM) to switch mouse/keyboard between those. It works well for my need and is an inexpensive way to get a 2x 5K monitor setup (total cost: 2100 EUR)
I am considering getting a M1 mac mini and use my 2 current imac27 retina as external monitors. My plan is to get a cheap small monitor for the mac mini, then use Barrier to use the imacs as external monitors.
https://zeitgeschehen-im-fokus.ch/de/newspaper-ausgabe/nr-4-...