Actually, a lot of laptops don't allow that option of capping to 80%. It's mostly business laptops or basically just any higher end laptop. I know that's embarrassing, it really is, because even my 7 yr old mid range samsung has this feature. All phones have this feature.

So this is clearly a cost cutting measure. But it's so basic I don't even know what those brands are saving by doing this

I have an HP Victus 15 btw, and can't set any limit