Microsoft and Apple are not the only examples of proprietary software, sir. And proprietary software developer is not necessarily a "corporation".
In the end, it should not be a discussion of opinions (I agree with Louigi, I don't agree with Louigi), it should be a discussion with facts and statistics.
There are areas of floss vs proprietary where stability and reliability are more or less the same. There are areas where proprietary clearly wins (video editors would be an obvious example). Maybe there are cases where floss is better that proprietary counterparts, although I have not seen a class of such examples.
I have reacted to the initial post because a person was claiming that because *a problem* on a Mac happened - that means that everything which is a Mac is now a problem. I have responded that this does not sound very reasonable and that I can talk about *a problem* I had with Linux and apply the same logic.