Wheelchair users spend their entire waking lives using wheelchairs, more or less.

They are justifiably VERY particular about their mobility.

If you had to spend all day, every day, riding a bike, and a failure meant that you would spend days or weeks (seriously, wheelchair repairs are SLOW), stuck in your house, how seriously would you take your bike options?

A badly fit wheelchair can send disabled people to the hospital with really serious problems.

Now imagine that bikes normally cost $5k-$20k. How stoked would you be to see someone offering an equivalent bike for $999?