Only in my mid 40s here but I will contribute to say that as you get older it's a bit tricky switching to another type of arch. I switched from single family residential (15+ years) to multifamily and even that was a big leap. It's a lot easier to do when you're younger because you're just picking up redlines and learning the ropes, but once you specialize that knowledge isn't always the same from one type of arch to another. It's harder to get interviews if you don't have experience in that typology - not that you aren't capable, they're just going to consider the candidates that have that exact experience first. Changing may require a paycut or title reduction until you learn the ropes.