This highly, highly depends. I've never bought a Meile appliance but seen others here swear on them for durability. Le Creuset and All Clad make cookware I've had for decades with no problems or degradation at all and they'll last for centuries as far as I can tell. I've got a 70L pack I bought from the Arcteryx factory store 20 years ago and I've damn near taken it to the moon and back. Virtually every mountain in North America. Had it rained on, dunked into streams, fallen while full of 40 kilos of gear onto sharp rock. Not so much as a single seam has ever frayed and it's just just as waterproof as it was the day I bought it.

And you're overestimating the cost of first class, at least in my experience, and that's kind of a lot of experience. I work in pre-sales engineering and travel a ton. My company won't pay for first class, but I'm 6'2" with ten screws in my spine and always pay for the upgrade, and it's usually between $200-$500, which has never tripled the price and almost never even so much as doubles it. You can sneer that I'm overpaying for nothing, but you try getting into a situation where sitting in a sardine can for four hours leaves you unable to stand up straight for 40 hours when you land. To me, it's worth it. The other option is I die with more zeros in my bank account, which is even more pointless. It's not like I'm failing to hit savings goals because of this.

Same thing applies with cars, by the way. I work from home when not traveling and don't drive very much, but I do own a luxury vehicle, and the difference between that any nearly any rental is pretty stark. It doesn't win on any reliability rating I'm aware of, but I've put less than 20,000 miles on it in 6 years of ownership and don't particularly care about the durability. I care about comfort and my own car is way the fuck more comfortable than the Nissans and Toyotas the rental agencies give me.

"Effete needs" is awfully sneering. I've lived on the back of an Abrams tank for weeks at a time in the past. I lived in the backseat of a 1994 Honda Civic and worked an overnight shift detailing theme park restrooms while putting myself through community college 25 years ago. I can live with little to no comfort if I actually need to, but given the choice and sufficient disposable income that it makes no difference, why the hell would I choose to be less comfortable just so I can brag to all the Bogleheads that my savings account has an extra hundred grand in it when I need five mil to retire anyway? Frugality doesn't push the needle much in the realm of travel and consumer goods. Cheap housing and a well-paying job is what pushes the needle.