Why Hex() returns upper case letters?

[Lebostein]

....but other hex functions returns lower cased letters, for example MD5Fingerprint() or SHA1Fingerprint().
This is not consistent. Or what is the reason for that?

[PB Fanatic]

I read it's because of using the "0x" prefix in some languages, so that "0xBEEF" doesn't look like "0xbeef". MD5 and SHA1 don't get prefixed with "0x", so their case doesn't matter. Perhaps they should go in upper case to match hex, but common use always has them in lower case (see MD5 and SHA1 in Wikipedia).

[luis]

Uppercase is better for energy consumption.

[heartbone]

....but other hex functions returns lower cased letters, for example MD5Fingerprint() or SHA1Fingerprint().
This is not consistent. Or what is the reason for that?

Are you suggesting DISCRIMINATION???