IMO stream abstractions make it too convenient to write fragile programs which are slow to recover from disconnections (if they do at all) and generally place too many restrictions on the transport layer. Congestion control is definitely needed but everything else seems questionable.
In a datagram-first world we would have no issue bonding any number of data links with very high efficiency or seamlessly roaming across network boundaries without dropping connections. Many types of applications can handle out-of-order frames with zero overhead and would work much faster if written for the UDP model.
In a datagram-first world we would have no issue bonding any number of data links with very high efficiency or seamlessly roaming across network boundaries without dropping connections. Many types of applications can handle out-of-order frames with zero overhead and would work much faster if written for the UDP model.