I dunno, I've been reading the book Playing at the World [0], and while in the 1960s, wargames and miniatures were at the center of hobby gaming, it seems to have more of a small-but-passionate fanbase. There was one major company that went bankrupt, and lots of small, transient publishers, gaming groups, and fanzines, mostly going into and out of business after a couple of issues.

Wargames got so baroque, I find it hard to believe very many people playing the 60+ hour campaign of Terrible Swift Sword. Although probably thousands of people have played Pandemic: Legacy, which itself will look strange in 30 years.

[0] https://playingattheworld.blogspot.com/