It was a complaint about 25 years ago when the first iteration came out. There was a full King of the Hill episode about it. Since then they refined the low flow toilets to be as good as the older style.

https://m.youtube.com/watch?v=J4f0MeoV5pQ&pp=ygUga2luZyBvZiB0aGUgaGlsbCBsb3cgZmxvdyB0b2lsZXQ%3D

I think it’s supposed to be clothing and talking style is more casual on left and more formal on right.