Most of Intel's recent chip improvements center around power efficiency and new features rather than raw processing power. Besides, 2011 was what, Sandy Bridge? That's still darned good and x86 CPUs haven't really improved significantly in performance since then.
Meanwhile, going from A5 to A10 is like going from Pentium 3/4 to Ivy Bridge/Haswell. Starting with the Core 2 Duo, we've already had an excess of CPU power for normal tasks that the best upgrade you can do for a computer is install an SSD. Even the A8X, raw performance is comparable to just a lowly Atom. It wasn't until the A9X that it matched i3-level performance.
The changes that smartphones have experienced in the past 5 years is more similar to going from Windows 3.1 to Windows 7 era rather than from Windows 7 to Windows 10.
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Meh, pass. Don't have a Mac and don't intend to JB.