Oh yeah, I remember seeing talk about that now that you mention it.
I've seen it said several times both on this forum and from others (I think Reed Timmer even talked about this once on social media) that Lake Michigan is at least part of the reason for the low amount of strong to violent tornadoes in Michigan, compared to surrounding states. Of course it didn't prevent many violent tornadoes from ravaging the state from the 50s thru the 70s, so there must be some nuances to that. There probably is a known reason for it, but I'm not educated enough on that right now, lol.
The Northeast's history of strong-violent tornadoes is pretty interesting. PA, NY, CT, and the New England region are not the areas that the general public typically associate with notable tornadic events, yet there's all the ones you pointed out, as well as the 1953 Worcester F4.