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Continued thread
Besides the #Nitrokey FIDO2, I also already have a Nitrokey U2F & a Solo Somu from #SoloKeys, so I wasn't too keen on paying 50€ + shipping for a new Nitrokey 3A Mini – a product I wouldn't need if my old key's firmware had been updated.
Instead, I bought a 
Token2 PIN+ Dual R3 whose hardware and firmware is also open-source and which costs only 25€ + shipping: https://www.token2.eu/shop/product/pin-dual-release3-fido2-1-key-with-openpgp-and-otp-and-dual-usb-ports #T2F2
The only downside is that #Token2 manufacture their products outside Europe (Nitrokeys are made in 
).
www.token2.euTOKEN2 Sàrl is a Swiss cybersecurity company specialized in the area of multifactor authentication. We are a FIDO Alliance member.FIDO2 USB Key, U2F USB Key, Cheap Yubico alternative, FIDO2, fido alliance certified security keys Replace your mobile authenticator with secure hardware OTP token! Easily programmed via NFC. Designed to use with Google, Facebook, Dropbox, GitHub, Wordpress, Office 365, Azure MFA etc.