There are two conflicting implementations of a parallel utility. And from what I can tell, the GNU parallel utility is much more useful than the one in moreutils. Which meant that when I was 1) doing processing which benefited greatly from parallelization and 2) found that the moreutils version wasn't doing what I wanted nor could I figure out how to make it do so (compounded by confusion over online searched providing GNU parallels syntax which didn't work), I had to remove the entire moreutils set to install GNU parallels under Debian.
The two versions aren't even a candidate for /etc/alternatives resolution as the commandline syntax and behavior differs.
Either a name change or refactoring to a different package for the 'parallel' utility would avoid much of this.
And I'd really like to see numutils packaged.
Also: 'unsort': sort -R | --random-sort
(using GNU coreutils 8.23)
(I'm not familiar with a seed-based randomized sorting utility though.)