We're considering this and similar features (gpg/ssh keys). One minor issue is the memory requirement, as our current chip only has 128KB of flash available. Th

We're considering this and similar features (gpg/ssh keys). One minor issue is the memory requirement, as our current chip only has 128KB of flash available. The bigger issue is certainly our time :), we're really pushing to have Solo keys available before Xmas, and thus we're prioritizing hardware and fido2. We also want to get fido2 certification, which of course means a lot more work that just making it work.