The New Input Package is actually just what Unity users call it because it isn’t the original and requires a package manager install from the stock LTR releases but it’s been out for a few years now. Still, you’re right, although I see no reason not to adopt it, most games that are using it will probably be releasing this year.
Was gone be one of my suggestions. This game is powerful good. It is a true mystery with you in the drivers seat in a way no other game can touch.