Imagine you see number of likes on a Post, if you see 230 instead of 231. It may not be a big deal. You can always do some invalidation at a certain interval to ensure that your data is still up-to-date.
It’s not a big deal in most cases. I have never encountered a case (in the apps I’ve built,architected) so far where a race condition like this could have business impact. It can be in others for sure!
So 1: Even in huge apps, it almost never happens, it’s not like 1000 people are editing the same doc at the same time. If this happens maybe it’s time to rethink your db model?
So 2: If it happens in most cases it’s not a big deal.
You always have the option to bombard the db not a problem.