I'd like to know the basis for your research or data on glass, this specific glass if you have it, that confirms it is not good for "safety, longevity and maintenance" and even more, "things people walk on or constantly stay in close proximity to." Have you actually read background on the development of this glass? It was published some time ago.
Everybody is entitled to their opinion on the webs., like "it's gaudy"...just like sitting around a bar and having beers and everybody spouts their likes and dislikes...but the glass info? improving that?
What are you basing this observation on, the panes of glass in your house, the windshield in your car? Modern architectural glass couldn't be more different.
Standing on a window make it break. They are minimally thin for their use.
Standing on a 2" thick plate of glass is like standing on concrete. If it isn't too long.
Durability... well, you do realize glass scratches under diamonds. It doesn't scratch easily otherwise. It can chip and break, but it's the Apple Store. Flesh and cloth and small electronics.
This store is made with a (probably) 10/15/20 maximum lifespan. They don't build stores to be forever-decor. It's a brag, an experience, art that advertises to get people INTO the store. This works.
I'm actually an architect with 20 years experience and have done my share of high-end retail and restaurants, thanks.
Glass scratches and fractures under a
lot of conditions. The fact that its' tempered (at the rails) doesn't prevent that. With as much traffic as that store is going to get, that baluster is also going to getting exposed to more than cloth and flesh. Carabiners on backpacks. Keys. Jewelry. Tourist asshats
trying to damage it. Best-case scenario, it will probably need to be constantly wiped down, or it will be covered in handprints. It's a nuisance, and one I wouldn't take on as an owner, but that's just me. I understand its purpose and it does photograph well if you like that sort of thing.
The fact that the treads are laminated doesn't prevent people from tracking dirt, gum, etc on them constantly. This isn't a movie theater in terms of gunk on the floor, but there's a reason you don't see a bunch of shock-white floor finishes. With glass treads, you get to see the grunge from above
and below.
And yes, this is a forum where all of us are sharing our
opinions. Since people asked, my work experience happens to be about making nice places, including designing monumental stairs, and I'd have done it differently. Big deal. Gaudy and ostentatious are obviously in the eye of the beholder.