I learned this recently. I got into waxed canvas/cotton jackets for outdoors stuff, where people would oil it for waterproofing https://en.wikipedia.org/wiki/Waxed_cotton

The jackets look nice but they are heavy, don't breath well, and are usually expensive for quality, and they are more water resistant than waterproof.

Compared to modern ultra-light synthetic jackets (down etc) that are legitimately water/windpoof which feels much nicer and warmed doing high activity stuff in poor weather. The only downside is they aren't as rugged, like getting a scratch walking through a bush or cuts from tools/dogs.

Old stuff always lasts longer but the IRL experience doesn't always outweigh the cons.