Past sets certainly had chase cards go for more in the early days of the release
Whats more, the gameplay of Fatal Push is absolutely fantastic, and the incentives the card promotes are absolutely brilliant
Griselbrand allows you to draw an obscene amount of cards in exchange for your life total
All rarities are represented, from common all the way up to mythic rare
You can still play it fairly by leveraging strong artifact payoffs like Urza, Lord High Artificer and Academy Manufactor, though you lose much of its potency
Just for the record, that is the 3rd most played Commander ever, behind only Atraxa and Tymna, and that latter one is a partner, so if you don't count her partner numbers he's #2