I disagree, and would argue that both are about equally frequent. For example, my phone shows °C in the weather widget, while the weather app only uses °. That does not change the fact that the actual unit is °C, and that would not change even if the whole world switched away from °F, and your original comment about the display having °C implying that °F still exists is therefore incorrect.

No, even if you only had one unit for a physical quantity, you would still need to specify that unit to know which physical quantity you are describing. E.g. “That object over there is 15” vs “That object over there is 15 kg”.

The symbol for temperature, measured in Celsius, is “°C”. It’s atomic and can’t be separated, since that would result in °, which represents the angle of something, not the temperature, and C, which is the symbol for Coulomb, which measures electric charge.

If it’s like the system in Sweden, it’s actually ~$400 straight up benefit, and ~$800 in a very favourable (optional) loan with very low interest that is paid back over 25 years.

Being able to handle it, and being able to handle it efficiently enough are two very distinct things. The hash method might be able to handle long strings, but it might take several seconds/minutes to process them, slowing down the application significantly. Imagine a malicious user being able to set a password with millions (or billions!) of characters.

Therefore, restricting it to a small, but still sufficiently big, number of characters might help prevent DoS-attacks without any notable reduction in security for regular users.