Quite a lot of responses in the genre "but what about [exclusively factory made product that has only ever been produced by corporations], it was good 10 years ago and is bad now??"

Those are an interesting exception, aren't they?

Products that cannot be created outside the factory setting really do have a quality peak (1950s Singer 201 sewing machine, 1960s Sunbeam Mixmaster, 1990s Mastertouch piano rolls).

No matter how much human manufacturing skill and technology improves from this moment, I won't have access to the old Mastertouch factory and I cannot make you a roll of My Old Man Said Follow The Van. Not because everyone these days only wants to make cheap piano rolls, not because I wouldn't be fantastic at making high quality piano rolls, but because that factory was demolished when it no longer had a market for its products.