To me it would make sense if the CT5 gets an interior upgrade, but not the CT4. One of the main complaints I've heard from journalists is that the 5 has essentially the same interior as the 4 despite it being a more expensive car. Would be a path to distinct it even more (powertrain aside of course). Or perhaps they could do it by trims (ex. '23 Silverados don't get the new interiors until you're at LT & above, the lowers ones still have the same small screen center stacks they've had for a while). So CT4's & 5's maintain the same set up until your at V-Sport or Blackwing level where you then get the newer layout.