I see where you're coming from, but I wasn't talking about phones or tablets. I specifically mentioned the iMac — for a desktop computer, the costs are negligible. You're not holding or carrying it, so weight and thickness are not that important. My iMac is already 10kg. Nobody would notice it if it were 10.5. The benefits far outweigh any negligible costs.

In my assessment, Apple hasn't make the right decisions when left to themselves. And it's not just me saying that. Even some Apple fans are saying so: https://marco.org/2017/04/15/mac-pro-audacity-of-yes

You're still free to disagree, but in that case we should agree to disagree.