I don't think it's just a static set, eg. use the PC for 10 years with completely upgradeable components or it's not worth it. I purchased my current PC case/g

I don't think it's just a static set, eg. use the PC for 10 years with completely upgradeable components or it's not worth it. I purchased my current PC case/graphics card, cpu and motherboard 5 years ago, have replaced the CPU cooler, and the SSD drives and added an audio card, upgraded the RAM and added an extra HDD. I think part of the problem is that despite smartphones being similar to desktops, they're not the same at all and have complementary but ultimately different purposes. One is suited to being upgradeable, the other isn't.