How is this game THIS good?

Currently 10 hrs in and each second has been a bliss. I cannot praise the combat enough probably a top 3 combat system I have ever played alongside Sekiro and Exp 33.

Hollow Knight and Silksong are my top 5 games of all time and both sold millions (completely deserved) yet I wouldn’t even have heard of Nine Sols even if wasn’t for word of the mouth and Ps Plus addition.

The game has AAA polish and is NOT too hard at all. I have hardly died while exploring and the first 2 bosses were sub 5 tries each.

Why hasn’t this sold in the millions I wonder like HK games? Only thing missing imo is Christopher Larkin tracks who makes each area of the HK games burst with life. I sure hope it gets a sequel and has better marketing because it just came out of nowhere for me.