> many people think they have 24x7 water, but they just have a very reliable, but intermittent, source of water

This is true. A lot of complexes have larger than reasonable storage tanks. If a new complex pops up next to your apartment building, you immediately see an effect in your water supply levels. It'll be interesting get a heatmap of the disproportionate distribution, but unless some authority gets involved, this may not happen.

> encouraging communities to introduce slab billing and try to do individual apartment metering

Agreed. Price affects behavior.

Thanks and good luck!