When trying to buy a 3ds NFC reader/writer (used for amiibo) for my original 3ds I noticed that these things are becoming kinda rare and expensive, eventually I found one cheap and bought it.
After a while I decided to reverse engineer the nfc reader so other people can still use amiibo on...
I may try the new ram site, and download more RAM to my Switch. Not sure if ddr3 is the right ram
for it tho. Edit- no it uses floppy Ram, just like @AncientBoi