I’d been on Reddit for 15 years, predating the Digg exodus. Actually, I find that my memories of the early days makes moving to Lemmy easier. Present-day Lemmy is already ahead of Reddit back when I started, both in terms of content and features/availability.
Went back and checked: Walter was 50 at the start of the series. The series spanned two years of in-universe time, and he died at 52.
Anyway, the point stands. Cooking meth is a valid shared interest for an older man and a younger man to bond over.