It's the new workflows that it enables via making existing features vastly more accessible (though there are some new features, such as merge conflicts not being a showstopper).

The only thing left for me to say to folks like you who think git is just fine (or even great) is that you're in Plato's Cave. https://en.m.wikipedia.org/wiki/Allegory_of_the_cave

You just don't know what you're missing out on. But if you give it a fair shake, you'll see the light quite quickly.

Take care!