Add a third party gadget to your wheelchair ?? Err Some of my wheelchair using chums have more than one chair, indoors, outdoors urban use and the occassional rufty tufty off road job. (Which; if youre listening Fiona; I would love to have a play with btw)
But that's the crApple attitude again, as they have thought of and 'designed' the absolute best experience (til' next year) anything or anybody outside the reality distortion field is a heretic and doesn't really matter.