How long do you think 1950’s era batteries last? Like in what world do you think “a 1950’s diesel on battery power surely outclasses a modem nuclear sub”? GTFO with that bullshit, lol.
A sub on battery power is essentially in free fall depending on their ballast situation, they’re not going anywhere because they would have to turn their loud ass engines on to go somewhere, which would then alert the entire modern navy they would be up against.
Which is why many (also western countries) rely on them for coastal defense.
No the countries that still use those just don’t have enough money to maintain a nuclear sub fleet for what’s essentially their coast guard, it’s cost efficiency not “better”.
All of your points are just deep stretches in vain attempts to be the “well ackschully!” Guy, or to be the contrarian throwing shit at the wall to see what sticks.