[cmdkeen]

Or go and work in that industry. I work in finance and the office has plenty of older programmers who have been trained in the theory of what they're working on.

Being a good software engineer still puts you in a large group. Being a good software engineer with good domain specific knowledge instantly puts you in a much smaller group.

It can also be much more satisfying work. And an awful lot more secure (depending on the firm) compared to starting out on your own.

Trying to be a rockstar competing on your coding merits alone is going to be damn hard to keep going for 30+ years.