Excellent to read this! Most media isn’t geared to anyone over age 30. It is irritating, and demeaning. I have many blog friends over age 50, as I am.
P.S. I find the double sidebar too much, too. I have a 17″ laptop in order to put as much on the screen in one go as possible!
P.P.S. You must keep in mind colour blind and colour deficient readers, as well as the disabled, with voice readers for useability issues.