On the positive site, MathOverflow Meta isn't visited that much - so probably even if a post there survives for an hour (or even longer), that doesn't bring too many views.
The new site is now up and running (outside the SE network) here
https://www.physicsoverflow.org/
PhysicsOverflow is meant to be some kind of a rebirth of the untimely passed away Theoretical Physics SE and a little physics brother of MathOverflow.
Compared to the former theoretical physics site,...
@NikhilKumarSingh Now I noticed that I gave a wrong link in my comment. In any case, this was the link I intended - and you can see that there is one deleted answer: data.stackexchange.com/mathoverflow/query/1479912/…