[SturgeonsLaw]

Unified memory is soldered to the motherboard and needs to be ordered with the new laptop, for prices that are well above what the equivalent amount of SODIMM would cost.

Fine if work's paying, but for personal devices (that might have been purchased before local models got good), people have what they have.

[AshleyGrant]

It doesn't have to be soldered to the motherboard. I've got a Minisforum PC that has unified memory installed via dual SODIMM slots. I put 64 gigs of DDR5 sticks that cost me over $600 and can determine the split between the system and VRAM in the BIOS.