[heavenlyblue]

There's no ordering in HTTP. If you could send a whole HTTP request as a UDP packet you'd get exactly the same protocol (obviously sans WebSockets - but you could work around that).

[duijf]

There are numerous valid HTTP payloads that are larger than a single TCP/UDP packet.

Ordering is important in these cases.

[heavenlyblue]

I think I made a point that “if you could fit the whole HTTP request in one UDP packet”, have you read my message?

[0xEFF]

How would you process an unordered response?

[heavenlyblue]

As I have said - you fit in in a single datagram