A founder-level discussion of the perfect technology stack with Alan Williamson

A lengthy discussion with Alan Williamson on the "perfect technology stack".   In today's environment do you HAVE to be running on Linux, or is Windows Server just fine for some shops?   C# or Java?  Java or Ruby on Rails?  Should you be getting rid of all of your old perl and PHP code?  Is this the end for relational databases?  AngularJS or jQuery?