My pastors mom would run around and serve "the old folk" at her church. She was like 86, and they were barely 70. She stayed busy, they had "retired" and stopped being active.

Quitting a job one doesn't like is fine, as long as it doesn't mean they quit life! Keep staying active, growing and learning, and maybe even building. Actively doing things that bring meaning and joy. That's how to stay young even if one was born almost 100 years earlier.

(At least that's what I've gathered. I don't quite have enough years since birth for personal experience yet 🤣)