Not sure if I am being ott, but surely there will be pilots and cabin crew who haven't flown in over a year being put back in the saddle which might cause issues?
I am sure some airlines will be diligent in making sure pilots have kept up their flight hours during lockdown as best they can, but many I assume won't have and this could be a recipe for disaster. (would be interesting to hear from those in this industry maybe what measures are in place for this)
My fears may somewhat coincide with binging aircrash investigation during lockdown but still... 