RAM really isn't that expensive, even if it is soldered onto the board. I wish more laptop manufacturers would make 16GB available in lower end models and have a true higher end of 64GB or more (instead of just 32GB).
From what I've heard, certain types of memory are only supported by certain CPUs/chipsets up to a certain size, and even though other types of memory are supported, those are a more power-hungry variety that laptop makers tend to avoid.
But in spirit, yes, this. The upgrade in RAM should be $80 in hardware, but I have to pay $900 for it because of the configuration options.