Linux is not suitable for the average user. I use Xubuntu on all my old computers, but I am 100% sure a normie would not tolerate the tedium of it. People want shiny icons with animations and a bunch of garbage on their computers to make them feel they are doing something. Linux is too static for that.

If I have an issue with an application or if I want an application, I must use the terminal. I can't imagine a Mac user bothering to learn it. Linux is for people who want to maximize the use of their computer without being spied on and without weird background processes. Linux won't die, but it won't catch Windows or Mac in the next 5 decades. People are too lazy for it. Forget about learning. I bet you $100, 99% of the people in the street didn't even see Linux in their lives, nor even heard of it. It is not because of marketing, it is because people who tried it returned to Windows or Mac after deciding it is too hard to learn for them to install a driver or an application.

Outdated view. Regular people ask for help at the genius bar or IT poindexter all the time. And pretty icons are plentiful.