The Microsoft Passport solution was proprietary, heavy-weight, required a licence to use and was over-engineered. It had a pretty good user experience but it wa

The Microsoft Passport solution was proprietary, heavy-weight, required a licence to use and was over-engineered. It had a pretty good user experience but it was Microsoft and it was also difficult and expensive to install. OpenID is decentralised, open-source, free and does one and pretty much only one thing very well. It may not win but historically those have been shown to be really good traits for success.