In the case of a dishwasher, I wonder how much environmental regulations factor into that. Modern dishwashers use less water for a cycle, but they also do a poorer job of actually washing dishes. So, what do you do? Prewash? Run multiple times? It's also concerning that the regulations on dishwashers are going to get tighter yet in the US if the certain organizations get their wish.

Likewise with toilets. Low flow toilets are mostly terrible and do a terrible job at flushing. Literally the only thing they're designed to do. If you have to flush 2-3 times with a low flow and maybe even involve a plunger, are we really ahead?

Just to add one more factor, what happens overtime in old toilets is that sediment stone develops on the inside, and causes enough friction for the toilet paper to catch and plug up. So you can probably except even shorter life span from the new toilets as they flush less water, so more likely for that stone to develop. So you're more likely to need to replace the toilet in the future. Also the flushing mechanism is proprietary, so if anything goes bad, more likely to have to replace the toilet. Really debatable if having to replace toilets more often is environmentally friendly. It will make more money for the toilet manufactures.

> what happens overtime in old toilets is that sediment stone develops on the inside

An easy way to get rid of that is to go to the hardware store and get a jug of muriatic acid. Then research the hell out of how to use it safely before you even think of opening it. Then pour a bunch in your toilet.

Bosch dishwashers do a great job cleaning dishes. Only one cycle needed. You usually have to pay for quality if you want it.