I wonder how much of this is actual decline in ability, vs. perception of decline. Can you give us some hard data, like your measured WPM over time? I'm guessi

I wonder how much of this is actual decline in ability, vs. perception of decline. Can you give us some hard data, like your measured WPM over time? I'm guessing that when you're young, you notice such mistakes less because you're happy and excited to be working on new stuff. Also, because stuff is new, you tend to be a bit more careful to do things "right". As you age and slide into a comfort zone, you begin to get a bit lazy, and expect things to just keep rolling along the same way they always have. As a result, typos become more noticeable because they interrupt your flow which you've gotten accustomed to. And any slight decline will seem like a big decline because it's that much more annoying.