Guys that say we didn't know much about Emperor in OT or Siths in prequels and it didn't bother us. That's incorrect - we knew who/what they were. Siths were one of the old "religions", The Emperor was the leader of Galactic Empire that rose on the ashes of The Old Republic. Snoke on the other hand? We were told First Order was established after the Battle of Jakku in 5 ABY from remnants of the Galactic Empire. Who was Snoke in ranks of Galactic Empire then? Where was he (as a Force user) in "balance to" equation of the original trilogy? Where did he get the funds to establish First Order and keep making bigger and bigger weapons? We didn't need to know these things about Emperor or Siths in OT or prequels because things were self explanatory - Emperor had ef loads of funds to build planet sized lasers because he had wealth of the Old Republic at his disposal, Siths on the other hand were around for millennia etc, they were the equivalent of Teutonic orders in our earthly history, whereas we didn't get anything on Snoke and First Order, we were just chucked into the middle of it and told "it is what it is, stop asking questions". As a script writing method that's about as sound as lavatory door rhymes.