#4 will never happen because that would be the end of 278 which was a very difficulty interstate to patch together, but it was done for a reason, so that there is a through-route that goes through the city. They can't just arbitrarily get rid of something so macro because some people on a certain part of its route don't like it. Totally different scenario than I-895 in the Bronx, where the road was basically a stub, or I-81 in Syracuse, where alternative routings for I-81 are possible