They are long overdue to have the exits and interchanges match the mile markers. There are still a few states that have the old system.
I like the strategy of assigning North and South to highways which travel around in a circular beltway. That makes it really easy to know which way you want to go. Just remember, head South on I-495 to go West, and North on I-495 to go East. Unless you are to the south of Boston...
I don’t really care which is which. I like the miles-based system, since adding a new exit then doesn’t usually involve adding a letter, but really, is having sequential numbering really that bothersome to interstate commerce and traveling?