[karma_pharmer]

QUIC is a step backwards here; it has no multipath support: https://lwn.net/Articles/964377/

Multipath: There are several areas where TCP still has an advantage over QUIC. One of those is multipath support. Multipath TCP connections can send data on different network paths simultaneously — for example, sending via both WiFi and cellular data — to provide better throughput than either path permits individually.

Server connection migration is explicitly forbidden by QUIC:

https://github.com/quicwg/base-drafts/pull/2031

[ajb]

The draft multipath extension is here: https://datatracker.ietf.org/doc/draft-ietf-quic-multipath/

It's on the standards track, rather than experimental, so likely to be supported once finished. There seem to be some implementations, including Apple:

https://github.com/quicwg/multipath/wiki/QUIC-Implementation...