1. The emphasis in this website of "you can change what you want" targets a pretty small population. Anecdata of the worst sort, but the vast majority of people in my orbit absolutely do not want to manage their computer. They want it to largely disappear so they can work and watch cat videos. Most of them think customizing their computer means changing their wallpaper. And that's fine! I never lead with "I can customize this machine to do what I want." I lead with "Eh, I got tired of forced reboots and disruptive updates and privacy issues so I switched to Fedora and it doesn't do any of that. If I want to fiddle with something I can [and I very, very much do tinker], but I don't have to."
2. I laughed at the notion of using linux to bring an ancient 5-year-old computer in the closet back to life. I mean, yes, that is one of the great things about linux, but the macbook pro I'm typing on right now is 5 years old and it runs like it's new. The hardest thing to convey about Apple equipment is that the TCO is lower because you can easily upgrade on a 5-7-year cycle, pretty much as long as Apple gives security updates. Expensive at the front end (though competitive with similar Windows machines), but not as expensive over the lifespan. (And, emphatically, I'm not saying you can't experience long ownership cycles with PCs, but, from experience, it's harder.)
On the other hand, when this MPB runs out of gas, I'm probably going to replace it with a thinkpad, or possibly with an ARM Mac running linux.