> I kind liked washing machines that properly heated to 90C
Your washing machine is likely defective. Nothing about the rules makes this particularly difficult and modern machines with good energy ratings can do it (though, mind you, you'll notice if you read the small print that the energy rating is pretty much just for the mode they expect people to use; the 90 degree mode will use quite a lot of power).
> vacuum cleaners that actually picked up dirt
Your vacuum cleaner is definitely defective. At best, the functional advantage provided by super-high-wattage machines over ~1kW ones was marginal and hard to measure, in many cases it was non-existent. Super-high wattage vacuum cleaners were primarily a marketing thing; 1600 is a better number than 1400 so people buy the 1600.
(Note that appliance manufacturers continue to do that where allowed; most washing machine manufacturers perform market segregation on 1200 vs 1400 vs 1600 rpm spin, for instance, even though once you go over a 1000 or so improvement is very marginal, and your machine will likely never actually reach the sticker rate anyway due to damage protection system)
> And these newer machines feature more plastic parts, are harder to repair and generally considered disposable
You're talking about two separate issues. Cheap shit washing machines existed both before and after the regulations. You can still get a washing machine with longevity similar to 70s/80s models (Miele in particular makes these) but it'll be expensive. As it was in the 80s; look at the inflation-adjusted costs.