What benefit does Russia get from escalating to nuclear weapons?
Putin wants to be alive, and have a country to be in charge of. Ukrainian aggression forcing a peace that’s more favorable to them doesn’t cost him either of those things. Deploying nuclear weapons against NATO does.
It’s not about whether or not Putin is willing to use nuclear weapons in the abstract. It’s about whether he would actually derive any benefit from doing so.
If you’re a Destiny refugee, the most obvious answer is Warframe, which just keeps on getting better and better.