Sorry I don’t follow your point.

Typical Linux distributions are almost objectively harder to use than Android. I’d be surprised if anyone really disagrees with this. When someone complains about Linux being hard to use, it’s the POSIX-based Linux distributions that must support arbitrary hardware (often poorly so) that they refer to. I don’t need to care about installing NVidia drivers and whether they’re compatible with EFI handover when I buy an Android phone.

I downloaded more RAM in the 90s. It was a product called RAM Doubler for the Macintosh. At that time memory had to be pre-allocated for applications through a setting in the resource fork, always used exactly the amount you set, and couldn’t grow beyond that. It was static, making it hard to run multiple programs simultaneously. RAM Doubler did wonders to work around that OS limitation.

It most definitely is not. The problem with CSS is precisely that it was invented by engineers who did not understand hundred years old printing / typesetting concepts.