[rklaehn]

It isn't meant to be groundbreaking. It is meant to be a rock solid building block that you can put into your application.

That being said, I think our use of QUIC multipath is pretty novel. If you use tailscale or a VPN, your connection (TCP or QUIC or whatever) won't immediately notice when the underlying transport changes (e.g. relay to direct or vice versa). So there will be some delays as the congestion controller learns about the underlying transport.

With the latest iroh using QUIC multipath, each path gets its own congestion controller, so switches of the underlying transport are more smooth.

Also, multipath allows us to treat custom transports as just additional paths.