A lot of younger guys are discovering 1970s music. I grew up in the 70s and my friends' teenaged sons and their friends are regularly asking me for recommendations of 1970s albums and bands. They all know Led Zeppelin and Pink Floyd but, surprisingly, they don't seem to know much about the Stones.
To assist some of the younger guys discovering 1970s music, I'll recommend Exile On Main Street is one of the essential albums for your collection. It's one of that decade's best albums.
This particular release has some extra tracks that weren't on the original album release. The extra tracks are worth having but they're not essential.
Bottom line: if you're exploring 1970s music, the Stones' Exile On main Street is an essential album for your music collection.