Which makes them meaningless, doesn't it? So how's that good storytelling?
okay. allow me to correct myself. not ALL status quos revert back to what they once were. there are actually MANY cases where the characters or the universe are permanently changed after a story arc
jason todd stayed dead for decades until he was brought back to life and became a supervillain
while clark DID come back, the events AFTER his death affected the DC universe in a major way, with 4 supermen coming forward claiming to be the second coming of superman (well...technically 3), and it lead to the annialiation of green lantern's city, and hal jordan goign crazy, killing everybody in the green lantern corps, and then killing himself...all because of this
has stayed dead, and made spider-man a relatively "darker" character
lost his company in this story arc. of course he got it back, but he quit drinking after this. and that changed the character a lot
in short, most of these major "shake ups" for these individual characters don't last long, but the consequences of their actions affect the universe, and the characters around them. altering the state of the comic that they're a part of, and the universe they live in.