> Instinctively, I think morning light is important to our biology for a daily reset and the solar cue of "high noon" is also a real thing.

You know, you can just set your watch to whatever you feel like?

> I'm sure I've read that sleep health experts have historically supported a change to permanent Standard Time, not DST.

What difference does it make? If people want to get up later or especially earlier, they can, no matter what the 'official' time is.

For an example: Spaniards and Poles are officially in the same timezone, but the Spaniards do everything 'late'. At least when you only look at the clocks; not so much when you look at the sun.