Comment by PeterStuer

As an outsider, it always felt that 'internal team politics' were the root cause of Microsoft's technological downfall. This went far beyond the GUI. In 'flagship' offerings like SharePoint or Skype/Lync/Teams you could see the unmixable partial code-bases brutally forced together under a single product name an foisted upon a user-base baffled by how this could have gone so wrong.