Yeah, it feels like deja vu. The speed of this bubble inflating, though, is much faster. It's feeling very dangerous and the longer this goes on the more dangerous it gets. I saw something yesterday that said AI spending is propping up 40% of US GDP right now. That would mean that this bubble popping would probably have a bigger effect over a bigger part of the economy than the dotcom bust.
It feels like the dotcom bubble was recent to those of us who lived through it, but 25 years is about a generation. But a lot of the people in the markets now (and running companies) were kids back then and thus weren't really aware of what was going on.