I think that the return of the "Driver Session" save is a great idea. Sometimes you just have to admit that the old way was in fact better or at least safer.
I totally agree with you! When I wrote that I didn't like the new "system", the reply from N3V was: "It's best for you, period."
I am a driver, not a content creator and usually have several different sessions in progress at the same time (each several hours long). More than once I was in a hurry to save and accidentally overwrote the original session by accident.
That's why I suggested that the default choice shouldn't be "Overwrite existing session". Never got any answer!