Up through Logos 9, this was still a thing. Is this still valid for Logos 10?
Absolutely, YES!
Sorry, it is a NO. The command Set Use Ngen to ... does not exist in L10, which uses .NET 6 vs. .NET 4 for L9 (different code bases).
I think Dave is right. The usual prompt doesn't take place on restart. We've entered the promised land of a better app design.[8-|]