You’re listing things that are high powered and or old. Modern PSUs don’t have that switch. While it’s in the early stages I expect more white goods to switch to BLDC motors which will likely use voltage transformers that’ll support the 110-240v.
People generally are not lugging white goods internationally, the average persons experience with different voltages is for laptop and phone chargers when they travel.
But for the matter at hand, the margin mentioned is needed on the solar systems, this is where the inverters can get expensive, which is why it can look like an unnecessary upsell to people who’ve never blown a device before.
> You’re listing things that are high powered and or old.
Sure. I have high-powered and old things, and I bet you've seen stuff like that too.
I'm explaining why I, as a non-expert, would not put 146V into something that says it can't take more than 150V.
> People generally are not lugging white goods internationally
Travel doesn't enter into it; My appliances came from Europe, they're just labelled a bunch of different voltages, so I think voltages within that range are roughly equivalent.
Furthermore, British have such a very special relationship with tea, such it would be entirely understandable that a Brit would take their kettle with them and often become quite annoyed that they cannot get an adapter to use it when holidaying amongst the yanks.
Not sure what I expected from someone who thinks 208V and 240V are close together from some labels they saw on some devices.