Like Himalayan salt. Hundreds of thousands of years old, shelf life of 2 years…
I suppose anyone gullible enough to buy Himalayan salt is also gullible enough to believe salt expires.
What’s wrong with preferring pink salt over table salt? It’s probably confirmation bias but I like the taste better and it isn’t any more expensive than decent rock salt.

Pink salt has a different mineralogy than other salt which does affect the flavor.

Part of eating is also visual enjoyment, so even if the texture/taste was exactly the same, you enjoying looking at it is also part of the experience.

Only thing is that table salt contains iodine which is something our body needs and generally we don’t get from a lot of other sources. So if you completely switch over to pink salt you might see problems with iodine deficiency.