They can always replace the trains if they feel the need to, however I don't think they would consider it for a long time.
I don't think they would add rotating seats to a Wing Coaster. Wing coasters are meant to mimic flying, and adding rotating seats would probably ruin that feeling
I think Grona Lund got one because ZacSpins are compact, and they are great at managing their space. If they had room for a big coaster, they probably would have went with that.
Granted, but it's in the back row and they use a camera with filming qualities similar to a potato
I wish I could make an amusement park trip in Europe