[vasilvv]

> There seems to be not too much interest in or hype about WebTransport.

I feel like this is partially because the main value of the API comes from working better on lower-quality networks, rather than providing the ability to do something completely brand new.

> FF and Safari don't support it yet.

For what it's worth, Mozilla are positive about it [0] and are actively involved in the standards process. I don't believe the WebKit team has stated their position, though there are Apple people who are involved in the standards process too.

> I think it's missing a killer app. But I am not sure what WebTransport would enable that isn't already possible with current APIs.

When we started out working on WebTransport, there were two major use cases we had in mind: live media and web games. IETF MoQ working group [1] will hopefully address the first one. I don't know whether anyone is using it for building games, but I don't actually have that much visibility into what's going on in that space.

[0] https://mozilla.github.io/standards-positions/#webtransport [1] https://datatracker.ietf.org/wg/moq/about/