Imagine it:
Crazyhouse 960
King of the Hill 960
Three-check 960
Antichess 960
Atomic chess 960
What would it take to make these variants available on Lichess? How does Lichess decide what new variants to add?
Problem is that some positions in 960 can be an instant win for white in atomic.
That's a good point. It'd be cool if based on all the statistics that Lichess would collect for Atomic 960 games it was the case players were more likely to get starting positions where the historical win rate is closest to 50%.
So those positions with easy forced wins would not be used and the setups that are even fair than regular chess 960 would become more popular.
I'd also be interested in seeing the ranked list of all 960 starting positions from highest win-rate for white to lowest-win rate. (In fact, I'd like to see this for regular chess 960 as well.)
Anti 960 and Atomic 960 would be an easy forced win in many many positions.