I see where you're going but sometimes the world is better off without every single thing being IoT. Especially for people with disabilities the world is not a

I see where you're going but sometimes the world is better off without every single thing being IoT. Especially for people with disabilities the world is not a hospitable place. I can't see how a 'modern' version if something as simple as tactile pavement would be any better for the disabled. There are, for example, people who are both visually impaired and hearing impaired that are capable of guiding themselves around by cane, in these instances tactile pavement is something that I think your 'phone in hand' solution just doesn't work. Additionally, not everyone owns smart phones--even today. I'm not saying your points are invalid but they're definitely skewed in favor of technology and perhaps a limited understanding of ADA requirements.