Every time I’m in the gym I use the same app on my phone: KeyLifts. For 3 years now, four to five times a week, the same app. I love it. I pay for the yearly subscription and the app is a huge if not the only reason why I’ve been running the same workout program (5/3/1) for years now. Whenever someone asks me about working out, I tell them about this app.
Great post, Thorsten. I think accessibility is a way to show you care. Correctly identifying interactive elements means you're staying current on best practices and trying to make your software usable to the most people, even though you don't "have" to. And it often means the interface is well-constructed in general.