By what?
By what?
I mean I get why people have preferences for the things you mentioned, but I'd call them appeals to "comfort and familiar" not "state of the art."
I personally think my 2015 Macbook keyboard feels pretty good. I also spend a heck of a lot more time typing on my Macbook than one-handing it, so the whole "thinness matters more than usage/responsiveness/reliability" thing doesn't really make sense to me as a tradeoff. I can't think of single time I've ever pulled out my Macbook and thought, "this keyboard isn't cutting it anymore."
But even if we decide that 2015 keyboards are all rubbish, other keyboards on other laptops being sold today do not have so many problems that users have literally written software to combat them by suppressing keystrokes. I don't care what design Apple regresses to or who they want to copy, but they need to start copying someone.
To my mind, it's pretty obvious that this is a architectural problem with the core design of butterfly keyboards. After multiple generations of the same problem, it doesn't look like it's a manufacturing defect or an anomaly. It looks like the butterfly keyboard is just plain and simple bad design. Apple wants to talk about being brave, they should be brave enough to throw out the keyboard and put in something else, even if that something else is just a carbon copy of a standard, modern ultrabook keyboard. I understand that the butterfly keyboard was very hard to build, and I'm very impressed with the tech that went into it, but if you want to make an exceptional product you have to be willing to occasionally kill your darlings.