I certainly have, particularly in the context of power wheelchairs. You're right to say that many of the standards—both provincially and from the Canadian Standards Association—are based on the post-Vietnam War manually operated wheelchair that is ubiquitous all over the world.
However, more and more people are using power wheelchairs, which are life-saving and mobility-saving aids that make it possible, as you said, to go further and faster and to live your life in a more liberated, independent way. Things like doors and the like are not built wide enough for those.