But the big scary force in this article is, "over 10 years, your C++ experience makes you progressively more expensive and less attractive to a Ruby shop". That's true, if all your 10 years were about was C++. C++ is a distinctly dumb thing to build a career around.
For that matter, so is Ruby, Rails, Python, and everything else that's popular today.
In ten years, everyone will be using Blub, and badmouthing those dumb ol' guys who were slogging around in Ruby. It's the one thing in life I can guarantee.
Most recruiters and big company HR departments are among the biggest destroyers of meaningful language there are. "Keyword compliance" is just another of the forces trying to dumb us down and turn us into automaton neurons in a big brain, exchanging and processing signals we don't have any inkling of.
Just my two cents, but I think you might be doing yourself a disservice by dumbing your resume down to their level... Unless the type of job you're looking for is just a cookie-cutter "latest pet framework" position.