>That whole way of thinking isn't appropriate. 5% is an insane number of people, when you are that large these things are no longer optional.
And hardware compatibility issues are? The fact that orders of magnitude more people don't use Linux at all, disabled or not, because of lacking features or usability is optional?
If 5% of people is an insane number of people, surely usability for them all is more important than for a fraction of that? And again, this is not a product sold by a corporation. Leave features behind and adoption goes down, then you get no accessibility features at all. If you want more accessibility features, you want more developers. For that you want more usage.