over the last few years, many attempts have been made at creating a smart cane. None of them have successfully lead to a market transforming technology that's actually used by any substantial users.
I saw a recent example of a smart cane getting news coverage, and it deserves particular attention because of a particularly egregious argument used within. I've seen this argument, or variations therein, made in several posts about smart canes. I will address this below, and lay out why this argument does not present a solid case in favor of a smart cane. I will then lay out several design and engineering constraints that must be met before I would ever be able to recommend a smart cane to another blind person.