Spending any time thinking about how many hours I've devoted to my guitar is never wise. I'm better off just continuing to be purposeful, disciplined, and staying open to rare moments of transcendence.
There were perhaps two dozen people present as several of those moments occurred recently at my first post-Covid gig. I'm reasonably sure no one in that art gallery - except me - recognized my moments of fleeting musical rapture. That predictable circumstance did not diminish the experience at all. My solitary communion with the music I was creating - no matter how brief - was magical.
As my second set began, I was back on more familiar ground - happy to be sharing music with others, proud of how my practicing and memorizing allow me to be flexible about what songs to play, pleased with my level of comfort. What single discipline has occupied the greatest percentage of your time? What lesson have you extracted from the hours you've spent practicing that discipline? I've learned many things via thousands of hours spent with the guitar. Today, being able to postpone gratification tops my list of the lessons I've extracted from more than a half century living with an instrument.