Disclaimer: I have yet to try any OSX above 10.10.
Zero issues with sluggishness here though. I tried an install of Windows a few years ago now after reading such talk on the forum. Now THAT was choppy/sluggish!
I'll post back if I can get around to trying a 10.12 system and have something intelligent to say.
Curious as to what the root cause will turn out to be!
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