I would very much like to be better at building websites that handle assistive technologies like screen readers well. I don't have a lot of blind users to worry about because they don't let you be a firefighter if you're blind.

But a lot of firefighters are people who simply did not do well in school, even the very senior ones, and that's because they are often very clever people who are of an age where things like dyslexia were just not diagnosed early or often.

So now I deal with a lot of people who use assistive technologies to help with dyslexia and related comorbidities. I have dyscalculia that wasn't diagnosed until I was 19 and at uni, and even then it was diagnosed initially by my mate's Educational Psychology undergrad girlfriend in the pub one evening. That was in the early 90s and we're better at it now - but not by much.