Absolutely, yes. As indicated by the terrible stock performance after the IPOs of Uber and Lyft. This is literally the market in action.
The Lyft price is down but it looks like Uber has kept pace with the overall market since their IPO. I think we'd struggle to find many people who would define "keeping pace with the market" as "terrible stock performance".
These two companies do not represent all of tech. They represent ride sharing.
Possibly not the best examples...
What I meant is that any poor market performance for Uber/Lyft could simply be a function of investors waking up to the aforementioned realities, it doesn't necessarily indicate the bursting of some broader bubble.
Furthermore, I don't even view Uber/Lyft as "tech" companies. Sure, they make software, but they're not in the software business.