default for quotRem in terms of divMod?

[Isaac Dupree]

In class Integral, divMod has a default in terms of quotRem. 
(quot,rem,div,mod all have defaults as the both-function they're part 
of.)  I'm sure divMod is more natural than quotRem to implement for some 
types... so why doesn't quotRem have a default in terms of divMod? it 
has no default! Then the "minimal to implement" will change from 
(toInteger and quotRem) to (toInteger and (quotRem or divMod)).

Isaac