With you. My iMac updated fine, BUT my MBP - well, now restoring from Time Machine. That says it allnot even touching this update... things work for me and there is nothing really new i need from it. apple updates don't 'just work' anymore and i been bitten by this too many times to care anymore.
Sadly, Apple cares only about the kids & the bling, & do not put the care into their updates they once did.
There was a time, pre-iPhone, you did not even give a second thought to updating.
Sad