I think they solve different problems. It doesn’t seem to me like the woman in the video would’ve been able to get upstairs as quickly or even at all, with the assistep. Especially moving upstairs with it seems very dangerous if there is a chance that your feet don’t do what you want them to.
Side note: “upstairs” is a great word that shows how ingrained stairs are in our lives as a means to move up or down. The Vertiwalk people have really thought outside of the box. Very cool.
Part of the issue of the woman in the video is that her left side isn't working well due to MS, while her legs/feet are working pretty fine. The assistep does not seem to solve her problem, and also seems like it would still be risky to use.
Now, that thing looks good, easier to maintain and cheaper.
And there seems to be bigger potential adaptability.
Something along the line of modular extensions for special disabilities.
