Rarity Categorization Issues

I'm not personally hung up on cards caring about rarity, but as far as caring about the cards being the same across printings, the types for many creatures have been updated in their oracle text and we follow the most recent oracle information. Could that be an option for caring about rarity as well? It could go by the most recent oracle rarity.

That’s a giant can of worms for three big reasons:1) It’s hard to track/remember. And it doesn’t have things like art cues to help.2) It could causes frequent change in functionality. Creature types at most change once, and there aren’t lots of cards that care about a specific creature type outside of handful of popular creature types, ones we don’t tend to change. 3) Deciding what to count for “last printing” could be tricky. Any version including digital? Just tabletop printings? Does it have to be main set? Do The List and Special Guest printings count? How about Commander decks where rarity isn’t even based on rarity? How about Secret Lairs?