OK, I have tried it and there is an improvement, at least until I fall into the Black Hole when no ports are available which requires a USB cable to be unplugged from one of my connected Arduinos, at which point the ports reappear
However, something else has happened that causes a sketch that compiles in the classic IDE not to compile in 2.0 but I will open a new topic for that when I have more details
EDIT
the problem appears to be with Auto Format. More details in a new topic when I have them