The New Jersey Turnpike is keeping the sequential numbering system. I believe it is exempt from the Federal regulations because it was built before the Interstate Highway System was established. It’s ludicrous to see how they added exits like 7A, 8A, 15X, etc. over the years.
Alphas on exit numbers are here to stay in either system.
Two-digit exits are easier to remember. There’s no reason for the 20 or so exits on the NJT to be numbered with 3-digit numbers. Exits 8A and 8 are much easier to remember than exits 108 and 118, their mileage numbers.
A preference for one system over another is hardly a reason to force every business and resident to change their “directions”, let alone for people to have to re-learn how to get from point A to point B. People will get lost and stressed because of these changes. There is enough change in the world, we don’t need to disorient people every time we feel smarter than the guy who came before us.