[yobbo]

> We are not even remotely close to living in a "We have too much power" world

Not a "world", but this happens locally in Europe due to wind/solar momentarily producing more than demand. There have been instances with negative prices.

Anecdotally, one mitigation seems to be adjusting the local base voltage to 220V so that peaks due to solar stay below 240V (or something like that).

Nuclear can, at least theoretically, be throttled hour-by-hour over the day to compensate wind, although hydro is probably more cost-effective if available.