I am using Zwift multiple times per week and love it.
There is 1 major frustration and lack of functionality. If you end a ride there are just 2 options:
Exit & save to strava
both options will effectively end your ride (yeah!) but also will quit the entire program :(. in other words to start another ride you have to restart the program.
I suggest a third option:
end ride & save to strava & go to main menu
or automatically go to the main menu after every ride. saved or not.
This is a very simple request yet it has remained unanswered for a long time.