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With all my respect to your knowledge, I do not believe you have a comprehensive way of seeing OS matters.
Less than a month ago I installed in my Mac through BootCamp first Windows 8.1 and then upgraded it to Windows 10.
I did it just for curiosity since I had never used BootCamp before.
I didn't do much with that Windows in the meantime besides installing Office and some Adobe software.
I just installed the free version of Avira antivirus, not a bad choice according to tests I found but certainly not the very best antivirus in the world.
Since I had no intention to use much Windows I was not motivated to buy a paying antivirus.
Now for pure curiosity I made a full scan of Avira and... it found ten (10) viruses, most of them Trojans!
Then Avira went on scanning the OSX partition and I stopped it after a while since there were no viruses at all over there, including anything which would have been active on the Windows side, which sometimes happens when downloading files in a mac.
In a system I hardly used and in less than a month somehow ten trojans found their way to my Windows 10.
If I had sensitive data or had made payments on the Windows side of my mac I would have run serious risks but I only do that in OSX.
I believe that one must see both sides of the coin before speaking so nicely about Windows and writing that OSX is just "a toy".
Ed
Well if you've only done what you said, you must be the most unlucky person that's ever lived.
As a consumer of all OSs, be it windows or OS X or Linux I've never personally experienced anything like what you stated and i work in the tech sector so pretty much live it everyday..
All the recent independent security reports put OS X at the top of the security "vulnerabilities" list.. 654 for 2015 vs 571 for MS. Food for thought while looking at both sides of the coin.
Yosemite wasn't all that stable for me, early version of El Capt were also a little lets say beta but of late most issues seem to be getting addressed.