This was a great initiative in Brisbane, Australia a few years back https://www.arts.qld.gov.au/aq-blog/art-in-the-stairwell

Agree. Check out China where even beggars are using QR code payment methods (though possibly as a means by payment companies and 'others' to collect data on donators?) https://www.businesstoday.in/current/world/beggars-in-china-...

Ditto. Just put in an order for the NuraLoops https://www.nuraphone.com/products/nuraloop

Best thing about these (and original Nuraphones) is being able to still connect an AUX cable to them (think flying).

That was debunked: https://arstechnica.com/science/2019/06/debunked-the-absurd-...