Samsung improved it's update process (and probably pipeline?) dramatically in the past years[1] and the software became much better and more polished.

I received the Android 13 update in November and less than two weeks later another security update. This indicates to me that they roll out updates as fast as possible. Normally I get the monthly security update in the first half of the month.

EDIT: I should probably mention that I usually only buy Samsung's flagships but the midrange device are getting the same treatment AFAIK.

[1] https://www.androidpolice.com/2021/02/22/samsung-solidifies-...