Cyrinishad
Explorer
Which is like saying 'want to learn about current Germany? Here's a guide to the german empire in 1881 for only half price. Come on, how much could have changed? Maybe you'll be lucky enough to glimpse the Kaiser when you get there'
Even though he's making a joke, Mirtek's point is important as to why a 5e FRCG is essential. Having bits of lore parced through various APs & SCAG still leaves too much up in the air for people that want to run their Realms game anywhere beyond the Sword Coast... or attempt to tie previous campaigns to the current timeline. If the time-jump to 5e was merely a decade instead of a century, I can see the 3e FRCG as being a viable resource for current games.