World, lemme make this quick.
It’s ok for you to pronounce “2008” as “two-thousand and eight” or just “two-thousand eight”. You picked up the habit in 2000, when the previous pronunciation convention was temporarily inapplicable.
HOWEVER, by my decree, you must stop in 2010. You may only pronounce it “twenty ten”, not “two-thousand ten”. And you may only pronounce 2011 as “twenty eleven”, and so on.
Yes, it sounds kinda science-fictiony, like we’re all living in the future or something. Well, we are. Get used to it.