This is a cool idea. However, are you actually using the subscript in two confusingly different ways? In I_2010, it seems you’re talking about you, indexed to the year 2020, whereas in {Abdul Bey}_2000, it seems you’re citing a book. It would be pretty bad for people to see a bunch of the first kind of case, and then expect citations, but only get them half of the time.
This is a cool idea. However, are you actually using the subscript in two confusingly different ways? In I_2010, it seems you’re talking about you, indexed to the year 2020, whereas in {Abdul Bey}_2000, it seems you’re citing a book. It would be pretty bad for people to see a bunch of the first kind of case, and then expect citations, but only get them half of the time.
I don’t think they’re confusingly different. See the “A single unified notation...” part. Distinguishing the two typographically is codex chauvinism.