I have one of the old blue U2F tokens (~20 EUR), and pretty much only used it for GMail so far. That alone is worth it to me because many other passwords can be reset by someone that gains control over my email account.
I personally find the token much more convenient than a TOTP code via app on my smartphone. And the U2F/FIDO part is very interesting as it eliminates phishing as a risk.
I ordered a Yubikey 5 NFC just now to play around especially with the NFC part and see if I can do something useful on my phone with that. I'm still looking for a password manager that could use an NFC Yubikey to unlock it on a smartphone.
I personally find the token much more convenient than a TOTP code via app on my smartphone. And the U2F/FIDO part is very interesting as it eliminates phishing as a risk.
I ordered a Yubikey 5 NFC just now to play around especially with the NFC part and see if I can do something useful on my phone with that. I'm still looking for a password manager that could use an NFC Yubikey to unlock it on a smartphone.