"If you pay 3x more for your appliances (TV, dishwasher, oven, etc...) you don't get something 3x more reliable/better engineered."

You do at the bottom of unregulated markets. For dishwashers and ovens, safety regs generally impose a high floor on the market. There is no $40 oven, because it's physically impossible to make a safety-compliant oven for $40. If it weren't for market regulation, $40 death-trap ovens would be a thing for sure.

The very cheapest compliant unit isn't _much_ worse than a mid-market unit, it might be a bit flimsier and wear out sooner; high-end luxury units aren't much better than mid-market units - because there's not much innovation driving progress at the top end. AEG and Bosch are still generally solid engineering, but there's not much point in paying more than that unless you like the aesthetics.

Mercedes and BMW - small-volume performance models aside - are like the big fashion brands, Vuitton etc., they're selling the idea of luxury to people who aren't even nouveau-riche, more like borrowing money to cosplay loudly as nouveau-riche. Compare old 1970s Merc convertibles with today's, the modern ones are just kind of ugly, aggressive and sad.

ADAM Audio loudspeakers are pretty good or were last time I bought a pair. They're designed as studio monitors but great for listening too. Perhaps they've gone downhill since being bought by a listed company a few years ago?