The promise of Multipath TCP is that you don't have to change the applications or the network middleboxes - if the OS on your end and the remote end are both co

The promise of Multipath TCP is that you don't have to change the applications or the network middleboxes - if the OS on your end and the remote end are both configured to use Multipath TCP, it'll used. SCTP requires either recompiling applications or using a TCP/SCTP proxy, and it doesn't solve the middlebox or discoverability problems. There's room for both solutions.