Comment by Xevion

Phrase-based passwords are far easier to type and remember than random gibberish at 20 characters. I would much rather type a 10x longer sentence than type random characters, even on mobile. It's far easier to validate a passphrase because we, as humans, will notice mispellings quite fast. It's only difficult if you're not english speaking, or have dyslexia - where I would refer you back to the original point: you don't need a 50 character password. Ever.