I specifically was referencing any benefits from induction motor drive with 3 phase. Of course you get lower current when you run higher voltage and more phases. But, again, that isn't free. You're paying for extra conductors and insulation.
Regarding EVs... I would assume that depends on the design. No EV sold in north america is even capable of being charged off 3-phase AC anyways, so it would require quite the redesign.
In the house we're currently buying there's actually an old laundry spinner (?) in the cellar, hooked up to three-phase power. The electrician mentioned that those motors basically never broke down and were far more reliable than 230 V one-phase devices. However, other concerns, like being able to put the washing machine in your flat out how many such outlets you actually have, probably phased those devices out. I'm not sure I'd consider a three-phase outlet for the rewiring now. The stovetop of course gets that, and, if necessary one day, the wall box for EV charging, but there's not many appliances these days that need it.
Not sure the electricians comment is related specifically to the three-phase itself, or just to the general observation that three-phase motors are put in more industrial/commercial applications, where reliability is much more important. Pair that with residential use of commercial appliances tends to be very gentle on them (e.g., they don't get run 24/7, vs. a commercial place that would try to use them at every possible moment) and you have a recipe for a very reliable device.
I asked them whether it was specifically about that and they said yes. The appliance in question was a consumer item, just a tad older, not a repurposed industrial machine.
Regarding EVs... I would assume that depends on the design. No EV sold in north america is even capable of being charged off 3-phase AC anyways, so it would require quite the redesign.