Yes, and those that have fought in these battles know its limitations. Head-of-line blocking when using multiplexing is definitely one of them. This is a very reasonable incremental improvement.
Importantly, it does not seem to switch out any security mechanisms and is both an implementation and a specification draft, which means that OpenSSH could eventually pick it up too so that people don't have to trust a different implementing party.
> [...] which means that OpenSSH could eventually pick it up too [...]
Remember OpenSSH = OpenBSD. They have an opinionated & conservative approach towards adopting certain technologies, especially if it involves a complex stack, like QUIC.
"It has to be simple to understand, otherwise someone will get confused into doing the wrong thing."