Pretty sure in the EU they’re required to be firmware locked to 25 km/h max per law.

How often that is upheld is debatable unfortunately.

Yeah, but you also do that one camping trip where you have to drive on a gravel road for like 400 meters (over 1000 foot, can you imagine!?) once every 3 years, so that makes it totally ok buy a literal tank on wheels.

Very simple - convenience.

Most people want to check how much power their PV produces from their phone. Yes, a proper solution like a openDTU that stays local only would be better - but it requires setup which most people simply lack.