Yep. And it has to do with how complex the rulesets are, not just how many rules there are. If there are dozens of rules that could apply at any moment, that's

Yep. And it has to do with how complex the rulesets are, not just how many rules there are. If there are dozens of rules that could apply at any moment, that's much harder to deal with (and learn and teach) than sub-rulesets that are compartmentalised (like when in battle, use all the following rules).