It also speaks to what we lose when we lose magazine listings of events (New Yorker effectively gutted this section within the past decade), movie showtime listings via newspaper, etc
We have a very strong archive going back a century until about 2015, but now wading through linkrot circa 2017 is miserable
And the current era of less-than-major-venue music listings in many places is exclusively on Instagram and Facebook pages of venues and bands.