> He directly referenced Linux which is famously under GPLv2.
Sure, he used it as an example, but he also explicitly made a generality about open source software, not the GPLv2. In any case, what he said was wrong about Linux, wrong about the GPL (including GPLv2), and wrong about open source software, so arguing over which of those he was talking about is a sideshow.
> You can argue with this wording if you like, but his observation is spot on
No, its absolutely, completely false. You can use -- or even distribute -- "open source software" (or GPL software, or Linux specifically) without "all your other software" being required to become open source.
By use it is pretty obvious he meant incorporate it as part of their products (ex. utilize a GPL library). Microsoft is a software development shop after all.
Sure, he used it as an example, but he also explicitly made a generality about open source software, not the GPLv2. In any case, what he said was wrong about Linux, wrong about the GPL (including GPLv2), and wrong about open source software, so arguing over which of those he was talking about is a sideshow.
> You can argue with this wording if you like, but his observation is spot on
No, its absolutely, completely false. You can use -- or even distribute -- "open source software" (or GPL software, or Linux specifically) without "all your other software" being required to become open source.