Cool, but needs a VPS. A simpler approach is to load balance/ fail over individual TCP/UDP flows, eg using mwan3

I'm hoping that with QUIC, there will be a way to use it's migration feature to load balance more accurately (no need to wait for new flows to start). But, right now there is no way for a middlebox to tell if the server end of an individual flow supports migration, as this is only visible to the client.