The geo-locking of model numbers is one of the vilest practices I've seen. I don't see it going away for any reason, it'll only be possible to combat by intl. legislation... but how do you even legislate that?
If you're making some device (for example, washing machine) which has a power cord and a knob for some mode selection with writing on it, then for the exact same internals you need different models where the power cords are different (USA, UK, Germany and Japan each require different plugs) and the writing on the device is printed in different language and with customizations such as Celsius vs Fahrenheit. You can't sell the exact same laptop model in every market because the keyboard layouts are different. Etc.
The IEC 60320 connectors were specified for exactly that reason. Honestly, I don't get why these were not made mandatory for all kinds of appliances. There are even locking variants available if vibration is of concern.
I'm not sure what you mean by the second sentence but you can't use most appliances made for Europe in America and vice versa. Most electronic appliances depend on the input voltage and supplying 240V can easily cause a fire. That is true for almost all electronic appliances (water heater, fan, washing machine, etc) but not true most "computer related devices" such as a monitor, PSU, charger. Since those devices already operate on a much lower DC Voltage, they often have transformers (not sure if that's the right word), that can scale down the current from either 120 or 240. [0]
That being said, a mandatory IEC connector (and it's variances) would help a lot to cut down unnecessary e-waste. Instead of throwing away a device because the cable is damaged, you can easily order a replacement that is around $2 and high quality, instead of relying third party cords that might have bad wiring from a non reputable brand. The reason they are not mandatory, though, is that most companies like to have their own connectors so that you either overpay for it or just buy a new device.
[0]: You should still always read the specs on the input current for the device though. It is dangerous to rely on the fact that similar devices can operate at 120V/240V because yours might not. You can usually see the specs on the website/packaging or usually near the input plug.
The biggest problem might be the amount of power a device can draw. Half the voltage gives you half the power, which is the reason why e.g. kettles are much less useful in the US.
That ofc makes electric kettles much less useful in countries with 110V grid. It also keeps stovetop kettles relevant in these counties, since stoves don't suffer power limitations.
Here in America "electronic appliances" would imply the tech/gadget category like TVs or computers where "electrical appliances" would be the big household equipment. Just to clarify in case that confuses anyone else like it did me, it kind of reverses the meaning of what you're trying to say.
Anyways, at least with relatively modern gear you can generally assume that anything with batteries or USB ports runs off a switch-mode power supply, and all but the cheapest of those will happily accept pretty much anything resembling residential power.
Anything with a large motor or any kind of resistive element (lighting, heating) on the other hand is almost certainly built for a specific variety of electrical service and will likely require modification to accept anything else without releasing the magic smoke.
The stuff in between those categories, well, RTFLabel. Outside of audio and ham radio gear I'd imagine most DC stuff runs on switch mode power supplies these days.
Even if that's the case, the appliances should be easy to repair for a competent person and if necessary allow the cable be replaced.
That should only affec the power brick, and hence the overall SKU, not the notebook itself.
> the writing on the device is printed in different language and with customizations such as Celsius vs Fahrenheit.
What writing is there on notebooks except for keyboard labeling and the product name? The certification label on the back already shows all labels for all countries.
> You can't sell the exact same laptop model in every market because the keyboard layouts are different.
Keyboard layouts are somewhat orthogonal to regions. I'm German, but use US-layout keyboards.
Now, companies can of course lie about this, in theory, but that's a bit like car manufacturers lying w.r.t. emission tests - possible, but you tend to get caught (cf. the recent Volkswagen case) so it's probably not worth it.