Separately, but still related, I've been thrilled by the rapid adoption of bidets and rarely see a friend's bathroom that doesn't have one. What are the chances we start to get bidets in hotels and restaurants? What the hold up?
You are living in a bubble.
2. if where you live does not have a "water cycle shortage", it's really not necessary. North America is huge and nowhere near as densely populated as Europe or Japan.
when I visited Hong Kong a loooong time ago, we were told that the water system for the toilets used salt/ocean water. Hong Kong is a small island, that was driven by their need. if you don't need it, you don't need it.
rapid adoption of bidets might increase public health/comfort by some measures, but it actually also increases water use. I feel you are influenced as much by familiarity/fashion as by a coherent water usage strategy
Having just been to India, and the Middle East, they have sprayers next to every toilet. When you go into one of these public stalls, there is often water everywhere. All over the seat, all over the floor. It takes a minute of cleanup just to get to the point where you can sit.
I don't know how people aren't walking out of these with wet clothes. I imagine you take your pants off and hang them and put your sandals in the corner... but I don't think that's for me.
(and it would no longer be aerosol, it would be pooposol)
If this was true, you'd also not clean your hands by washing them, only aerosolizing the dirt from your hands
I imagine they may use a piece of paper to avoid pushing the buttons directly.
My assumption is that the lack of awareness would be part of the reason for public toilets to not use them. It's often not clear which button to use, so people just push one at random. We have a hard enough time getting people to flush at all, so adding decisions into the mix doesn't great.
In men's bathrooms, the assumption is probably that a urinal will be used for #1, so it's a safe bet that the stalls are mostly used for #2 (at least by design of the overall bathroom). With this in mind, having a dual flush seems like an unnecessary extra cost.
Instead of having two buttons, there are designs that do the smaller flush by lifting the handle instead of pushing it down. That way people who don't know about it always get a full flush and the people that do can use the smaller one.
IME the home ones can be finicky in terms of reliably resetting and fail more easily, but i still like the water savings.
Also, a lot of toilets now look normal but are dual-flush - you just have to hold the handle for a longer flush.