Comment by wongarsu

All of this was well known before the war though. The idea that navy is incredibly vulnerable modern anti-ship defenses has been a major consideration in the Taiwan situation for at least a decade (mostly in relation to the ability of the US navy to even operate in the area in a war). More recently, Ukraine has made a great show of sinking navy ships with cheap unmanned surface vehicles

Back in WWII you could sail your navy up a river and expect positive results. In the 21st century, the idea of attacking an enemy-held strait with navy doesn't work