Still should calibrate DD turbo each ride although in practice, not being able to see if there's any change in numbers I have no idea of the variability of a KICKR, say.
I have a direto, you can do a calibration but you can't actually change anything, if it goes too far from the number written on the turbo then it means the internal belt has stretched and Elite will send you a new one.
it's a tough market at the moment but a direct drive turbo solves the problem...