The recently-revealed critical vulnerability in that other OS took a month to be fixed. We can argue over the process but the end-users were exposed to enemy attack for a month with no help from M$. Just like the battle of Dien Bien Phu, it’s not good enough to expose an outpost for a long length of time.
That’s not good enough. FLOSS can do the job in a day or so when the stuff hits the fan. Surely a well-funded corporation should be able to do as well but M$ is run by salesmen. They pour energy into making the next sale and they care little about the future lost sales caused by the frustrations of end-users. M$ seems to feel that with enough leverage they can fix any PR hit. That might work for a given instance but this is becoming routine. No one wants to be fighting malware. They want to do their productive work. The world does not want to work for you, M$. Get over it.
Folks who have migrated to GNU/Linux may have to work hard to make the transition but they can relax a lot afterwards. That other OS and its apps will be around for years drawing attention from malware and GNU/Linux will just keep growing staying small and modular with lots of immunity built in. The cost of fighting malware is almost entirely born by users of that other OS and GNU/Linux gets a free ride. I like that. The cost of monopoly is compounding itself and the price of Freedom declines.