Checksum offloads and protocol ossification

I'd love to see some focus shift from extremely weak checksums like UDP's to stronger ones like CRC. CRC has all the magic properties needed: it's linear, so you can subtract parts off, and it can be shifted, so you can take a CRC of some suffix or middle chunk of a packet and extend it to the CRC of the whole thing.

And yes, I have seen bad packets over TCP that survive the checksum check. It's just too weak.