This is super impressive! It's a cool POC, although it is already clear that it would be feasible for Apple to put M.2 slots in Macbooks if they wanted to.

I wonder how much it would cost to have someone replace the BGA NAND chips in my Macbook. Apple charges $6-800 for a 2TB upgrade for a Macbook (depending on whether it's a 250 or 500GB drive originally). Someone would have to be able to do it for like $2-300 for it to be a feasible upgrade, especially considering that my warranty would be void. I assume there are people overseas who could do it cheaply. I assume it would be fairly quick for someone who knows what they are doing.