one thing for all the ps4 people out there: dont fuck with the system when its downloading something. People are reporting a lot of freezes and stuff, especially with the f2p games (dcuo, warframe, etc) if you start doing other shit while its updating. Start an install and then just go away until its completely done. It kinda sucks because I couldn't figure out where the progress bar was while it was installing/updating Killzone, but it was done within 15 minutes.
and before utnayan shitposts, no, its not ok that a 2013 console seems to get fucked multitasking, but there seems to be something buggy with the downloader chip or OS functions so may as well save yourself some hassle.