[abadpoli]

My take is that it’s related to the parent commenter’s thoughts on the relative monopoly that Bell had.

If you’re a monopoly with no practical competition, sharing your accomplishments gets you good will and has little downsides. But if you’re Microsoft, and one of your big moats and competitive advantage is the massive fleet of data centers you’ve been building up over the years, you don’t want to hurt yourself by giving your competition the information they need to build new, more efficient data centers.