You shouldn't worry about falling out of the technology rat race. Everyone's stack is different, you would be lucky to time learning a technology with a particular job opportunity that is using it. You may as well just research it the weekend before the interview and be upfront about your ability to learn it.

You can't know every technology and in 5 years you will probably be applying for jobs with tech that doesn't even exist yet.

Well I think my skills suffer more because of work: after a day of "being productive" at work, I no longer have the time and energy to explore and learn new stuff, which is how I gained and expanded my skills in the first place.

In certain parts of governments, non-profits and academia, can be found jobs which both (a) have lower stress / better work life balance, and (b) use innovative tech which keeps one's skills sharp and up to date. These jobs don't typically pay amazingly, but sometimes have a good pension plan, and the option is always there to go back to well-paid higher stress workplace later to fix finances if required....