[growse]

Quite a few billion people are not fine with it, and I'm not seeing any serious argument designed to convince them why they should be.

No-one cares if you set your watch to UTC regardless of your latlng. Meanwhile, the rest of us will just crack on with how we've always done it.

[poincaredisk]

Yeah, to be honest I don't think this idea is realistic at all. Inertia is extremely strong, and we can't get rid of much easier things (like DST, that most of the world agrees is a bad idea). I also agree that nowadays the benefits would be minor.

So I don't seriously purpose we do it, but it's fun to speculate how it could be. I think in an alternate reality where the whole world has the same hour, people would shudder at the crazy idea that every country has a different time on their clocks.