I don't think that is a factor the general consumer can even dream up. People rather 'consume' a laptop and then throw it away after a few years. It's why there are so many low-end models sold and why so many manufacturers make them (usually based on the same blueprint from the CPU manufacturer + laptop design from the likes of Compal or Foxconn, nobody wants to waste money on designing those internally).
At the same time, the use case where manual 'servicing' of a laptop was more relevant has mostly passed. This came about because of post-imaging-once lifecycle management in the business sectors (which isn't universal just yet...) combined with the cattle vs. pets approach when it comes to business laptops. A lot of personal use has moved to mobile devices and clouds, making the laptop less and less of a special thing to be preserved.
To me, this all is a bit sad and wasteful, if we were to make it easier to swap out modules while keeping the form factor, that would be a good thing. But that costs money, and unless the mass market sees a use in it, they are not going to pay for it.