It tends to get better with younger generations. I’ve gotten a lot of good and bad feedback about some changes I made during the last months but pretty much exclusively from friends and co-workers under 40.
Was never weird though. Just smile and say something like “Right? I’m trying that out. Thank you :)”
Accepting compliments can be learned.
Use an inverter-controlled one and you’ll be fine. Our emergency communications shelter runs off one of those just fine, with a cheap offline UPS in there.
Yes, those that control frequency using the engine rpm aren’t that great for most switching power supplies.