That's it, I never played Nintendo games because I never had their hardware. For me personally it's just not worth getting into their closed ecosystem. Basically same reason I never had anything apple.
its not insane unless you're doing completionist stuff, you can easily cap a few sets of armor for key purposes just with chest loot and some monster mashing. I created a second game on another user account after my first game (with duped gems, etc) and its not really grindy until you try to max out like a third set of armor.
you can get most of the battery cell upgrades by opening chests from exploring (and where the chests are becomes obvious if you collected a few old maps) and following the main story. The problem is exploring the depths isn't all that fun. I never even used duping to get battery in my original game- by the time I explored the depths fully I was maxed out.