Great topic!
Here's my story-
I loved guitar/music since I was a kid, picked up and self learned starting at age 12. Played like a fiend throughout my teens, it was to a point my whole life- I joined a few bands after high school only to find the worst in people - drug addiction, lack of preparedness (lazy people), entitled a-holes, etc.. Nothing ever seemed to work out for long, so I eventually gave up and just stayed home with a 4-track cassette recorder and wrote music, it made me happy for a few years.
In my mid-20's, life, women, career, etc.. started taking over, I moved in with a girl, focused on career, and found myself playing guitar less and less.
Then, every time I picked it up, I found myself struggling to play things that were once easy, I was getting rusty, and every time I played, I was even rustier. It usually would end in 15 minutes or less, where I would just put it down out of frustration. Before I knew it, I was no longer picking it up.
I still thought about music all the time, creating melodies and riffs in my head, but every time I looked at my guitar, I would just deflate. My job excluded me from having the time to devote to it also.
Next thing I knew, 8 years passed me by, and I still yearned to play, thought about it all the time. Got a job, good ol 9-5 deal and I decided I wanted to get back into it. I had over the years traded or sold most of my gear and had little left, so I went to guitar center and bought a new guitar, multi fx pedal and amp. Started playing again. This time I knew I was super rusty and needed to really bone-up so I started with the basics and worked my way back up. It came back surprisingly quick, like riding a bike

Within 2 months of maybe 8 hours a week practice, I was as good as I ever was.
I started looking for bands, went in and out of a few before finding my current cover band (been over 3 years with them), as well as teamed up with an original folk artist and played guitar for her at shows as well as recorded a professional EP.
I'm in my early 40's and have no illusions as to how far I can go, but I refuse to believe there's a ceiling either. I have a good day job, and don't plan on going on tour or anything lol.
A lot of musicians draw a very distinct line with doing it "for fun" which I really disagree with. Playing gigs costs money. Free gigs aren't really free- you put wear and tear on your gear, time, and gas $, as well as wear and tear on your vehicle or band-van, and the costs of keeping that up as well. We all do it "for fun" but I only do 2 shows a year for free, and insist on them being charities. I don't do "for exposure" gigs anymore, as they are a huge scam IMO.
Well, went off topic but that's my story.
(edit) To add-
I also developed a severe case of carpal tunnel about 6 months after getting back into it and over the next year, playing got harder and harder.. I tried everything from chiro to acupuncture to massage therary, electric therapy, cortisone shots, etc.. Nothing worked and it got worse and worse. Playing became so painful I would have tears running down my face at gigs from the pain.
I got surgery, sat out for a couple of months, then went back into a full regiment of practice, hand exercises, etc. The surgery literally saved my life and now I actually play far better than I ever did before (which I attribute to the military-style practice regiment).