Earlier quoted context omitted.
What has been proven is that consumers don't care about customization too much. If they want it, they don't want it that much.
How has that been "proven"? If your argument is that people are still buying Macs despite the lack of customization, well that's ignoring the state of the market. Most consumers only have two choices (Mac or Windows), and oftentimes it comes down to familiarity with one OS over the other, rather than any specific features or merits of the actual product. If Apple released a "customizable" Mac, or one that could be up…
People in the tech community want modularity and upgradability. But you must remember that tech forums are tiny bubbles. The mass market overwhelmingly DGAF.
If you want to be successful at selling laptops to a tiny market, it is possible. You will have a company that looks like Framework or System76.