Hen and egg problem. End applications did not want to upgrade because no third party libs were available. Third party libs did not want to upgrade because no

Hen and egg problem. End applications did not want to upgrade because no third party libs were available. Third party libs did not want to upgrade because no applications would use them anyway. The correct way to handle such a transition is a proper bridge to import old libraries, then applications dare to upgrade without missing out on libraries which later leads to a bigger demand on third party libraries. Another big reason is simply plain old stupid FUD.