That's great if you're in a shallow anchorage (average depth: 45 feet). Less so if you sink in the Arabian sea and you're under fire during the refloating process.
I also suspect modern ships are a little more sensitive to complete immersion.
> In May 2019, the Minister of Defense was presented with a report from Defense Material which concluded that a possible repair would cost 12–14 billion and take more than five years. The cost of purchasing a new corresponding vessel was estimated at NOK 11–13 billion, with a completion time of just over five years.
