I've worked in multiple systems where we've needed country-specific DoX() and you always end up completely separating them. You start trying to fit one core log

I've worked in multiple systems where we've needed country-specific DoX() and you always end up completely separating them. You start trying to fit one core logic for all countries but it always gets reduced into nothing and you wish you had just copypasted the first country logic to the next to begin with. Once everything is separated you feel much more comfortable introducing that specific Mexico change without messing around with the core logic. Of course things that are truly agnostic shouldn't be duplicated but that tends to be extremely narrow in the end and you never know what it is before you have a lot of countries. It quickly becomes a maintenance nightmare trying to fit broad logic to impossible flexibility.