Google Calendar will survive 5 more years

Created by gwern on 2013-05-02; known on 2018-05-02; judged right by gwern on 2018-04-02.

• gwern estimated 95% on 2013-05-02
• themusicgod1 estimated 71% on 2017-04-28
• gwern   judged this prediction right on 2018-04-02.