On a long enough time line everyone who participates in most any sport quits. Some fit it in again as an extreme hobby/ obsession. With very few exceptions everyone comes up against their limits. It's great to take a hobby seriously. I've built my life around my 'hobbies.' But at some point family/jobs/other hobbies take precedence. It's just the way it is. Evaluate what's best for you. And don't spend a lot of time in mental self-flagellation. Far better riders than either you or I (or anyone else) have had the epiphany that enough is enough and needed to move on to other things.