Unless they lose 99% of their users, there's enough demand. Your level of pessimism on this specific detail is ridiculous. Tor might not last forever, but it won't be lack of HTTP support that kills it.
If you wait a few years for HTTP/3 to settle, proxies will be available that could be glued into tor inside a weekend hackathon.
> If you wait a few years for HTTP/3 to settle, proxies will be available that could be glued into tor inside a weekend hackathon.
In 16 years they have not managed to support UDP and now you say of a project (you are not familiar with...), that they can get it up over a weekend hackathon.
Do you have a contact address? I could mark my calendar for 2025. "some proxy with HTTP >= 3 and HTTP < 3 will exist" is a very basic prediction. It wouldn't have to be integrated into the tor codebase either, just spawned by the tor process.
Tor doesn't have UDP support right now because it doesn't need it for anything. The last 16 years are not equal to the next 16 years, surprisingly enough.
Everything that goes over UDP is not supported as of 2018 and some volunteer project is going to figure this out?
Hubris.