I would argue against the last point "display assembly is completely fused".
Replacing parts with any laptop usually requires a cheap alternative. For he majority of time. It is the RAM, Harddrive, etc.
You rarely see screens or monitors replaced and when they are replaced you dont just replace the panel you replace the entire screen.
For DDR ram, in order to run at 1600MHz a better design is to ditch SO-DIMM modules.
FACT: You can run any RAM at a faster Hz when it is directly soldered to the board.