Possibly my dingy. It's a eighties fibreglass boat. I'd feel super comfortable swapping any part of the rig and doing light repairs on sail or hul. Although, if the mast broke or the hull was badly damaged I would probably have to let it go ):

Also, on the topic of boats. That one isn't my boat, but I somewhat frequently sail a stjärnbåt, a type of smaller wooden boat. There we have a real ship of Theseus situation, I think there's no part of that boat we couldn't repair.