Just to be clear: Filson is still "good" quality for the price IMO, but vintage Filson is built like a tank. My button down shirts from 15 years ago have never even needed a button replaced, whereas newer shirt construction from Bangladesh does not seem as strong to me. Material quality is better/heavier for my older shirts.
I'm not sure if they scrapped it, but somewhat recently (a year ago?) I saw that they were trying to facilitate sales of vintage Filson through their site presumably because they see the people who care about quality buying vintage Filson on eBay instead of the newer stuff they're selling.
Also, while it's certainly not the case that "made overseas = lesser quality", Filson's website has a prominently displayed filter/category for "Made in the USA". This is where you can get a really heavy knit sweater for $500 that IMO is worthy of the old Filson name.
This is the same story with everything. Companies all want to take as much as they can possibly squeeze out of you while giving you as little as they can get away with. A few companies start out by charging higher prices for higher quality, often pricing out a large number of consumers, but eventually the greed wins out and they start to cut corners too.
If you're wealthy enough to keep chasing after luxury goods you'll be ripped off at a slower pace than most, but eventually you'll be increasingly disappointed in what you're getting and have to look harder and harder, and pay higher and higher prices for anything nice. The poorest people are stuck paying increasing prices for poisonous products that are basically trash and that's all they can barely afford.
Anecdotally, I wear a wool coat from Filson that is nearly 20 years old. Halfway through its life they reconstructed the fraying cuffs for free.
0: https://www.filson.com/products/chambray-cpo-shirt-rinsed-in...