>None of those skills have been practically useful Honestly you never know when something you are familiar with becomes important later. Something that was im

>None of those skills have been practically useful Honestly you never know when something you are familiar with becomes important later. Something that was important to get it done may not be as important in later tasks. (My Operating Systems Class at university was greatly useful in my first job, not as much after) My dabbling in JS got me job programming timecard apps for blackberries and changed my work trajectory. This field changes so fast and you can't learn everything, so learning things you enjoy and help you get what you are working on now. That and data-structures and databases, you can never know enough about both.