Comment by gravitas

I don't understand your reply or what you're trying to disagree with; comparing a Yubikey - a product intentionally designed to interoperate with many other services and hardware platforms at it's core - is being compared to a RSA SecureID key which is a singular, targeted Enterprise solution ($$$) which does not intend to interoperate with other competing solutions (TOTP e.g.). RSA SecureID and Yubikey have different core business models.