Standard procedure for whom? I don't really do super long range stuff but require adequate accuracy and I haven't changed my zero for years. It's a Zeiss Diavari with Optilocks on a Tikka mount. Although I have to admit that if I'd travel long distances to hunt and have the rifle thrashed around, I'd prefer to check the zero. However, I hunt 15 min from my home so I go for a hunt dozens of times a year so it's a bit different for me.
I'd say that if you zero your rifle one day and on the next range trip you need to change the zero slightly (<0.3 mrad), it's not about the scope not holding its zero. It's about the temperature, humidity, barrel fouling, the hold of the gun, powder temp, position of the saturnus etc if you're using a decent quality scope.