[throw0101d]

> Wasn’t this already tried at least once and then reverted some 2 years later?

In the US in the 1970s, but more recently in Russia as well:

* https://globalnews.ca/news/1469007/russia-abolishes-daylight...

* https://www.theguardian.com/world/2014/jul/01/russia-state-d...

[Brybry]

Note that, as your sources state, Russia tried permanent DST and changed to permanent standard time instead.

They didn't revert back to a system of switching between DST and ST annually.