In before Steam has moved off of web interfaces (I haven't checked in a couple of years so they might be doing something different now particularly with big picture mode), but I'm frustrated that we all started building interfaces for native platforms in HTML/Javascript and it didn't lead to embracing any of the accessibility features that those same interfaces would get by default inside of a web browser.

To be fair, my understanding is that Linux screenreader support is pretty bad, but it does seem like if a developer is going to the trouble to build the majority of their interface in a semantic XML-like pure-text format, there should probably also be an option to read that text out loud.