very common. I was member from time I was 10 until 25. went back to Grad school, moved away got married had kids. Bought a business. Kept playing 20-30 rounds a year green fees and joined again when I was 40 and been member last 20 years at same course. lowest Handicap ever and I hit the ball 20-30 yards less of the tee but In fairway every time. course is close by
I started when I was maybe 12. Got real good at the game and then life took over around 25.
Haven't been on a golf course since, I do however go to a driving range from time to time in the hopes that one day I'll play a round.
I highly doubt that I'll ever be as good as I was at 18.