I always try to research my appliance purchases, but longevity info is decidedly not at my fingertips. Had not considered appliance repairman forums, that's a nice idea (until it gets commonly known and then abused).
I'm also not sure how much the repairment knowledge will help besides information about general brand quality. By the time some appliance makes the repair rounds it is probably no longer for sale because it has been replaced by a newer model that may be better or worse.
although my new business spams appliance repairman forums with bogus information to drive up value of crap products sounds like a surefire service to sell Samsung etc. perhaps these forums being mainly old school internet would be better protected against this kind of abuse than say Facebook or other engagement algorithm gameable sites.