The foam has disappeared, but the enthusiasts are going on. While it's not a craze, I believe mechanical keyboard is still superior for longer writing sessions (Apple's and Logitech's scissor switch keyboards are pretty good, too).

Gamers are moving to hall effect switches because of the things they enable, but from what I have seen, some people are still building their keyboards, and people still use mechanical keyboards.

I'd love to continue use mine, too, but they are bit too noisy for my office, and I don't continue computers at home as much, anymore.

Another chilling effect is caused by the tariffs, because people can't get their keyboards or parts as easily anymore. I got mine from Kickstarter directly, but it's impossible for me now.