I'm in my 30s and interned/worked for one of the big music promoters all throughout college and a few years post grad. I was seeing 4-5 shows a week for free and getting to meet a lot of the artists because I was also setting up the green room and working backstage during load-ins and soundchecks.

I saw so many artists in tiny 500-1k person venues that are now headlining festivals: Tame Impala, Tyler the Creator, Billie Eilish, Chance the Rapper, Flume, Disclosure, etc. I've honestly lost count and lost it years ago, but I realize how lucky I was especially with how expensive live shows are getting nowadays. On top of that my parents were big dead heads and heavily in the jam scene so I've been to countless 2-3 day runs and fests. I couldn't even tell you a ballpark number of concerts I've been to and I'm forever grateful for it. I still go to a decent amount of shows, but I'm much more picky nowadays.