I am researching the Forgotten Realms universe to improve my GM skill in the 5th edition and came across a fact that upset me: there is not a single source in 5e that would fully describe the state of the world of the forgotten kingdoms at the moment.
For this reason, I was forced to turn to older sources, and discovered the book Ed Greenwood Presents Elminster's Forgotten Realms.
This book was released in 2015, when 5e already existed. But still it belongs to 4e.
As we know, a lot of things from 4e have been changed or removed.
And here is the question itself:
Is Ed Greenwood Presents Elminster's Forgotten Realms a reliable source from which to take information for games in the 5th edition? Maybe this is a very good book, but there are things in it that should be ignored? Then what are these things?
P.S. I know that there is a Sword Coast Adventurer's Guide, but its volume and quality do not suit me at all, and I am looking for a more comprehensive source. Maybe you can think of other books that are more suitable for the 5th edition.