It would require extensive support from browser vendors, so if google got behind a proposal like that, it could probably be pulled off.

Most servers would likely use both protocols for quite a long time before one could be discarded.

I feel like the biggest problem would be all the ISP's DNS servers, ISPs are notorious for breaking all kinds of stuff and this would probably be just another thing they break.

Technically, one company (like DNSimple) could add a new record and start using it themselves. For it to be universally supported, however, it would need to go through the standards process and become part of the DNS standards.

My computer doesn't understand your new record type, so if you want me to see your site, you're going to have to wait until I upgrade.

Using 'computer' is a bit disingenuous there. Upgrading a computer sounds like you're buying a new laptop or replacing hardware to deal with a software protocol change.

The software installed on my computer doesn't understand your new record type, so if you want me to see your site, you're going to have to wait until I upgrade it.

I have a hunch you upgrade at least once every six months or so, often to music (;

My point was that your wording made it should much more like a hardware upgrade, which is on a slower cycle for sure.

And I think you'd probably good. I hear your preferred OS has a good track record for implementing new networking stuff quickly.

Well, yeah, but more generally there are other people too. :)