thefader.com via relisten.net
Adam Jacobs, an avid concertgoer and once casual, later committed, concert archivist, began recording the concerts he attended in 1984 to tape. He went on to record over 10,000 concerts

I've seen this floating around for a bit, but you should also make sure you're familiar with the Relisten app. It's on iOS and Android, and it pulls concert recordings from the Internet Archive. I imagine these 10,000 concerts will eventually make their way there, which will be a huge boon on top of the already incredible number of concert tapes on the app.