ADA lawsuits in the US are frequent and often somewhat frivolous, and they probably cost way more than European fines, so I don't think the regulation puts the European software market at a disadvantage. I admit it's bad for small companies, though, when they want to or need to use alternative GUI frameworks (usually, for technical or licensing-related reasons). For instance, I was planning to use Fyne with Go for some small apps, but it has zero accessibility support and is therefore out of question.