The article mentions it at the end, by "downfall" they don't mean Apple is going to fold. They mean that Apple making such a difficult to repair laptop is now going to cost them a ton of money because the "keyboard" repair requires replacing the entire top half of the machine due to the design. The article argues that if the design had been easier to repair they would be able to do this otherwise minor repair much more cheaply.

I think that's a fair claim, even if the title is a bit overblown. Apple is paying the price for what is probably too big of a compromise in the design of the laptops.