Hi David just out of curiosity and in case the others are interested... do you have a bag of tricks that helps you get more juice out of the older machines such as the MacBook Air 2013. Perhaps bouncing tracks in place, reducing the computer’s eye candy, controlling spotlight, etc. Also, maybe, not running too many apps at the same time. These are the common ones I have read on the net, and I’m sure there are more. But I’m keen on your knowledge on the matter, if you’re inclined to share.