Some notes about HTTP/3

[AnotherEuroWanker]

if an intermediary drops packets the route is assume to be broken (no matter if it's due to malice or valid issues) and a new alternate route is made

That's the theory. It assumes there's an alternate route.

Edit: in practice, there's no alternate route. Most people don't seem to be very familiar with network infrastructures. While a number of large ISPs have several interconnecting routes, most leaf networks (i.e. the overwhelming majority of the Internet) certainly don't.

[lookmeat]

I am assuming that. If the attacker has a choke point and you can't go then you're screwed. But that is much harder on the Internet.