We like the way Homer presents his arguments, because it avoids some of the rather tired approaches of FOSS advocates. He assigns financial value to the risks, using the established measurement of Return on Security Investment [PDF]. He uses the Crowdstrike outage from last July as a comparison. For instance, what if a US administration instructed Microsoft to refuse service to everyone in certain countries or even regions?
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He tries to put some numbers on this, and they are worryingly large. He looks at estimated corporate Microsoft 365 usage worldwide, and how relatively few vendors offer pre-installed Linux systems. He considers the vast market share of Android on mobile devices compared to everything else, with the interesting comparison that there are more mobile phone owners than toothbrush owners. However, every Android account is all but tied to at least one Google account – another almost unavoidable US dependency.

theregister.com/2025/06/26/cos…

What if Microsoft just turned you off? Security pro counts the cost of dependency

Comment: Czech researcher lays out a business case for reducing reliance on Redmond

^{Liam Proven (The Register)}