I like approaching it from an accessibility standpoint. I don't need it and I enjoy the act of driving. That said, if I had vision impairment and wanted freedom to travel further from home with no assistance self driving cars make a lot more sense.
The product isn't necessarily "for me", but that doesn't mean it shouldn't exist.
At the moment, export/import is not part of the "Passkey" standard. The FIDO Alliance has a draft of the Credential Exchange Protocol that would allow such actions. Allowing the trivial export of a passkey would end up defeating the cryptographic protections they offer.
If the FPGA representation of the Gameboy components (CPU, etc) are accurate, then there should be no discernible difference.
Going the FPGA route is great for a turn key experience whereas the a diy solution is great for scratching the builders itch. Both are good, just depends on what you’re looking to get out of it.
I think there'd be significant overlap with the folks that setup Windows 11 without a Microsoft Account and those that use tools like Open-Shell to rid themselves of some of these start menu "enhancements".
The product isn't necessarily "for me", but that doesn't mean it shouldn't exist.