This I don't get. If you are looking for durability, a Raleigh or similar from 40 to 50 years ago are plentiful, relatively cheap, and have proven the durability test for sure. I have a 1961 Gazelle 3 speed. Obviously pretty durable. Its already old, so I don't have to wait for it to grow old.

And I must admit, I just like the "patina" of the older original bikes, along with the headbadges, decal work, etc.

As long as the original surviving specimens are out there, at reasonable prices, I would stick with that route. And financially (I can't help it), a nice vintage Raleigh or similar will continue to go up in value, while a new Pashley will take a > 50% haircut value wise in a couple of years (at least around here).