FWIW I’m Hoping that the combination of AI and ridiculously powerful small devices will finally get us to the point where we can interact with computers primarily through voice. A limiting factor seems to be misunderstanding what’s actually required, and you likely have insight and can build experience there. So if you were able to on your own time, build some small systems and demonstrate effective voice interaction, that might lead to some interesting work, and benefit others. From C#, you might be able to transition easily to Swift and target the Apple ecosystem, which has an a lot more accessibility support, and also has the possibility of becoming an independent developer.