I must resist asking if it used Java. I would love to see the Vasa but have not made it to Stockholm yet. I did see the Mary Rose in Portsmouth which was incredibly fascinating to see (large portions of the ship remain so you can see the layout). Mary Rose is from the century prior to Vasa and Äpplet.
Certainly not the same thing, but the 2 literally jaw-dropping moments I've experienced looking at "ships" in museums are the Vasa and the Space Shuttle Discovery (at the Smithsonian National Air and Space Museum's Udvar-Hazy Center outside of Washington).
Visited both. Mary Rose is well presented with all the extracted findings in their own galleries. But visiting Vasa is much better experience, it's intact, you're so close etc.
Have you been to the Mary Rose recently? I read about the changes since I was there around 2000. I remember the spraying and thinking it would take forever for that process to be finished. Interesting to be on that other side of forever and see visitors can see the boat without the spraying chamber in place.