The bit about being hosted on SSDs is silly. I could host that site in unused registers of my CPU.
A special case of preformatted response used to be baked into microsoft IIS. If you connected to an address that could only redirect to another address, IIS wouldn't even wait for the request, it would just send the 302 response and hang up. This, it turns out, was not really compatible with Mozilla at the time, and may have violated some RFCs, but I kind of liked it as a hack.