Yeah, as someone who paid $80 AUD for it, I got more out of Metroid Dread than I did out of plenty of 3D AAA games that were the same price.
Some of the best games I've ever played are 2D.
It's always seemed silly to me, the notion that a game's quality scales linearly with its budget. I've played AAA games that were about as fun as watching paint dry, and I've played games made on a shoestring budget that were an absolute blast.
Seems the players have spoken with regards to Dread. Since these numbers are as of December 31st, it's probably already the highest selling Metroid ever as I type this.