Someone actually is trying that idea in Georgia right now (https://www.thedrive.com/news/34648/capsized-cargo-ship-in-g...) but it really is not easy!

Many likely problems: equipment avilability to do so, time it will take, debris falling off and from the operations, risk of capsizing, probably need to load pieces on barges/crane but canal is not much large

in half? I would not go for less than nine pieces.

https://www.youtube.com/watch?v=0ENOJBLVgjw

What a fascinating watch! That they were able to produce such clean cuts through the entire ship with the cutting wire is absolutely incredible.