Earlier quoted context omitted.
Efficiency related regulation like the energy star is THE reason why companies started caring. Same with low flush toilets. I vaguely remember the initial ones had issues, but tbh less than the older use a ton of water toilets my family had before that were also super clog prone. Nowadays I can’t even remember the last time a low flush toilet clogged. Massive water saving that took regulation. Efficiency regulations…
I literally had a new toilet put in a couple of years ago. It clogs pretty easily. So you just end up flushing it more, so you don't actually save any water. BTW the same thing happened with vacuum cleaners, you need to hover more to get the same amount of dust out because they capped the power in the EU. My old Vacuum Cleaner I managed to find, literally sticks to the carpet when hoovering.
And the Norwegian made and designed low flow toilets in my house flush perfectly every time. Have the flush volumes reduced further in the last fifteen years?