I used to see MA plates quite frequently when I lived up in Rhode Island. Actually, I was right on the border, with Massachusetts in walking distance. No, really - that close. The Stop-n-Shop I patronised was in Bellingham. Good petrol prices at the time.
Anyway, I don't see MA plates that often in the Philadelphia suburbs. Those I do see are likely college students or tourists. Still, this is another state where low numbers are a source of pride, and thus seeing them anywhere is always cool.
If you know anything about how Massachusetts runs their plate serials, though, you'll know it'd be nigh-on impossible to track high numbers. Neighbouring Connecticut managed to get away from a stupidly complicated format in 2015. Your move, Mass.