Should OS X 10.11 be Apple's last Mac operating system?

[iMore.com]

Microsoft says Windows 10 will be the last version of Windows. Should OS X 10.11 be the last version of OS X?
Microsoft's Jerry Nixon raised eyebrows at the company's Ignite conference recently. He said that Windows 10 "is the last version of Windows.". Microsoft may be on to something, and I'm wondering how well it would work for the Mac when it comes to OS X 10.11.

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