This system-wide cancellation of surveys is prima facie evidence that Marriott knows full well that its guests are getting royally Bonv°yed!
The good news is that this is caused by the financial distress due to COVID-induced travel pattern changes.
So whenever the travel industry returns to normal (or a new normal), Marriott knows they need to up their game to restore guest satisfaction.
The survey suspension also gives insight into a more charitable explanation of various brand suspensions being "due to COVID-19". They do not always mean "to reduce transmission of COVID", but sometimes "to reduce financial losses proximately caused by COVID."
Either way, we've been Bonv°yed!