While you're no doubt correct about how quickly you learn it's no reason to not bother!
Both my parents have cruised through 65. Together we've just finished updating their PC and laptop to Win8, they've Android phones and an iPad to boot. Far from struggling they're relishing the new interfaces, the faster responses and just the excitment of learning something new. They now want a touchscreen for their PC.
Give new OS'es a shot regardless of vendor or prejudice and you might just enjoy learning again.
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