

Insightful article. I have to confess I never realized the accessibility situation was this bad.
I also want to highlight this excerpt from the comments:
Making things accessible isn’t hard technically. But it requires coordination and people to care about it enough to work on it at the expense of other features. If [I] developed an application on a team and said I had ‘one security guy that works on that stuff as long as it doesn’t interfere with the rest of our work’ I’d be dragged over the coals and have my project forked by the public.
But with accessibility? There’s really no sense of priority or urgency despite it being broken for years and not putting much effort in to fixing it.
In this case it’s more of a switch away from the last cool new thing. Totem (like Music) was built around a media library navigated from within the app. By default Totem doesn’t even support opening videos from the file manager, which is something you would probably expect of a video player. It also crashed for me when I tried using it as intended so I’m not surprised to see it replaced by an app that really is just a video player.
That said many apps get replaced not for feature reasons but just by being GTK3, and they tend to get replaced by their own forks to GTK4 (such as the upcoming replacement of Evince). Why their devs choose to upgrade toolkits this way I cannot say.