I thought it was a myth too, but iOS 11 is undeniably much slower for me. And I don't understand why, as it doesn't seem like it adds many features. There's a n

I thought it was a myth too, but iOS 11 is undeniably much slower for me. And I don't understand why, as it doesn't seem like it adds many features. There's a new filesystem, but shouldn't that be faster, not slower?