This comes down to your definition of “core business” Open source (LibreOffice) has never seriously threatened office for professionals so much as maybe google

This comes down to your definition of “core business” Open source (LibreOffice) has never seriously threatened office for professionals so much as maybe google docs, and even then not so much. And they’ve made great moves towards subscriptions so that’s going strong. Windows isn’t threatened so much by open source unless you talk about either Apple or chromebooks. Again, less about open source and more about the web. They’ve already lost developer mindshare to open source culture. So they responded apppropriately by open sourcing their entire .NET platform, and actually using a useful license like Apache, not some murky custom commercial nonsense. How do you suppose they’re going to start hurting the open source world? I’m all ears, especially given they’d have to sue companies like FB and Google. Just because Nadella was there, it doesn’t mean he ran that operation that sued SCO. Otherwise that would’ve come out. Plus with personalities like Bill Gates, they would clearly override any dissent.