>>Usually I lose interest halfway between the part where they tout the greatness and importance of what they're selling and the hello word they build with it.
>
>Even if this is omitted, it's not my way to learn. I like to try and test - but for that I need a goal, so I will learn when I need it. Bad habit. But mine. :)

Good habit, actually. Didn't waste time learning stuff someone's trying to sell, that you'll never use, or will be deadended/replaced/abandoned by the time you do. This is on need to learn basis, and you don't need to learn this...