Which would be even longer than 3h if some EU bureaucrat didn't realize that making the default unacceptably long for everyone will result in nobody using it.
My shiny new (2025) Bosch washing machine has a big button on the front which switches from the default 3 hour programme (for 40 degree wash) to 1hr 30m. Like, it's not very _well_ hidden :)
Interestingly, the 3 hour programme isn't really a 3 hour programme. If you use it, the timer will generally start at 3 hours and drop to an hour or so after 20 minutes. I have no idea what the heuristic is, and the manual is silent on the matter.
My Bosch dishwasher takes 3 hours I guess due to efficiency, it seems reasonable. I didn’t go with a European washer dryer combo though (my laundry room has a vent and I’ve heard that heat pump tech still isn’t good enough).
Due to ecodesign legislation, I would assume that all machines that can be legally sold in the EU would count as "uses less water" in the US.
The dishwashers are another can of worms. My last one had an EU and a non-EU program, and you quickly learned to pick the "non-efficient" one if you actually wanted clean dishes.
Heat pump dryers are in a slightly weird place in that they're boring old tech in Europe (they've been common for over a decade), and exciting new tech in the US. This means that dryers made for US preferences (physically larger, either three phase or <1500W, etc) are generally first or second models (and thus unreliable) while those made for European preferences are mature designs (and thus reliable).
The other advantage of heat pump dryers is that they operate at lower temperatures than the other types (so damage clothes less); on the negative side, they're slower.
I'm somewhat surprised anyone makes a vented washer-dryer at all.
Stacking still takes up usable space; in rooms designed for unstacked washers and/or dryers the space above is frequently used for cabinets