This!!!
I went to California earlier this year. In our apartment we had a freezer that was clearly made before politicians thought to decide to put a cap on how good a freezer could be. It was fucking amazing at freezing stuff. No freezer I've ever used could freeze this good. It was probably from the 80's - old/sturdy AF.
I wouldn't mind paying for some extra solar panels to feed it.
I’m not sure that’s a function of regulation but more a function of most modern freezers defaulting to -18°, where an American or industrial freezer is -22 to -28°C.
Getting a better energy efficiency score is one reason (and consumers are motivated on running cost, not just environmental) but presumably these are cheaper to manufacture as well.
I have an American style, EU-compliant freezer than I can set to -26° which I bought for preparing sashimi safely. It rocks! Highly recommend them.