Not sure if it outsold MC94 but it’s definitely better, and easily the last noteable album of the genre that was still in the game with that style and sound. Adrenalize came out a year before with god-awful songs and Should honestly be forgotten.
I vote Exposed, and Too Fast for Love as the other bookend.
Too Fast For Love is a great album but it didn't exactly light the world on fire at the time of it's release. Shout had a much great impact than TFFL did. If we are simply going by debut albums, I would have to argue Def Leppard's 1979 debut or even Van Halen's 1978 debut, the latter of which made a major impact on the hard rock and heavy scene are better choices than TFFL.
I feel like TFFL defines the look and style and sound of the era better than Metal Health, where MH had more filler and was really kind of one-dimensional in comparison. Van Halen's debut is definitely arguable, but more in an ahead-of-it's-time kind of way, same as Desolation Blvd was a huge influence on a lot of albums, including
TTFL. But I think, in the context of "The Era", Van Halen, Desolation Blvd, Toys in the Attic, Killer Queen, UFO, Stained Class, Lovedrive, etc., are all 'Roots' albums.
"The Era", is when it POPPED. around 1981. That's the only reason Metal Health is mentioned, cuz it's kind of a lousy album. But because it was the first to go #1, "The Era" begins with anything in the year around that album. Some bands were on their first and some were on their fifth, but that's where it pops.
I just think TTFL is one of the best of those albums, but I just remembered Back in Black, and fuck TTFL, BIB is even better, and was a bigger slammer than Metal Health, in a bigger way. It's the first legit SUPER FUCKIN AWESOME METAL ALBUM OF THE EIGHTIES.
So rant over man, I've arrived at Hells Bells. AC/DC may not have looked like the hair parade that followed them, but they led that fuckin parade without even knowing it.