This is something I’ve noticed since living in Germany. I’m from the US, so I don’t know if it’s a metric:imperial thing or a German specific thing, but things are way more standardized here.

You’re not always allowed to fix your own appliances (or you can, but your insurance will be nullified for any even remotely related- like replacing the foot on a washing machine means that water damage from an unrelated leak in the washer’s drum years later may not be covered), so the standardization doesn’t always pay off, but it’s definitely standardized.