Is HTTP/1.0 still in use?

Question

Say one is to write an HTTP server/client, how important is it to support HTTP/1.0? Is it still used anywhere nowdays?

Edit: I\'m less concerned wit

Answer 1

A fair number of servers will deliberately return HTTP/1.0 responses because some (older) browsers will afford a HTTP/1.0 server a higher connection limit than the 2-connection limit imposed for HTTP/1.1's persistent connections.

But in general, most "HTTP/1.0" implementations are really just slightly limited versions of the HTTP/1.1 implementations, and many HTTP/1.1 implementations don't really support some features of that version (e.g. pipelining in particular).