What is a tech bubble anyway?

Cedric Chin says comparisons of our current AI *maybe-bubble* to the dot-com bubble and the 2008 GFC are limiting, Matthew Prince does a post-mortem on last week's Cloudflare outage, "hl" is a fast / powerful log viewer for humans, Enthusiast Guy's Continuum 93 is a fantasy computer emulator, and a list of things that aren't doing the thing.