This is a great reminder by Jesper Ottosen that we should focus on testing the right things in the right amount over spending too much time on detailed test cases.
Customer experience is one of the key factors of perceived quality. Dan Petersen explains how marketing practices can help testers influence that.
There's some great advice in this thread about where to go after reaching the Senior level as a tester.
You may also want to check out Ryan Peterman's article on Finding Staff-Level Scope, based on his experience at Instagram.