I'm not sure that I've ever been to what most people would call a 'gig'.
OK, I've seen loads of pub bands 'gigging' but I suspect you'll say that doesn't count.
I've also been to plenty of 'concerts' (from the Vienna Boys Choir to the Spinners and Ralph McTell) as well as 'events' (such as local 'world music' days in public parks) but, again, you'll probably say that they don't qualify.
I was brought up in a house where 'popular music' meant Gilbert and Sullivan (or, just possibly, Flanders and Swann). I was allowed to listen to the children's music programme on the Light Programme on a Saturday morning but only on the VERY strict understanding that I turned the radio off IMMEDIATELY afterwards. If even the first few seconds of Brian Matthews' 'Saturday Club' was allowed to come from the speakers, my mother would rush into the room, shouting "I've told you before, we don't have THAT sort of SO-CALLED music in THIS house!". I'd then be banned from listening to the children's programme for the next month and, quite possibly, be sent to bed early every night for a week. So I was never really allowed to 'get into' popular music. (My early teenage years though coincided with the rise of the pop pirates and, with greater freedom by then, I did spend a great deal of time listening to them. However I was far more interested in the personalities of the DJs than what they were playing).
It's only in the past couple of decades or so that music (other than the classical kind) has really started to make any sense to me. (Prior to that, it was simply 'background noise'). However that means that I now find myself listening to bands and performers from all over the world, rather than just the generally predictable sounds of UK and US bands. I'm far more likely to be found listening to a group from Senegal or Mexico than the likes of Blur or Oasis. (Please put me out of my misery if you ever find me listening to either Blur or Oasis!!!).
OK, there are a few bands which I wish I'd known about (and attended their gigs) when they were performing (with Dire Straits being top of the list) but I don't really think that I've missed out on that much (except that I never got tickets for Bellowhead's final tour recently).