For my money wireless headphones still haven't gotten to the point where they can be trusted for mixing or even critical listening. For tracking, whatever. But I would never mix with wireless phones.

For tracking or mixing?

I feel like my $0.004 per play is going to be $0.002 soon. How will I ever afford that bugatti now??

A lot of early rap had melodies though. Arguably the very first rap song ever, Sugar Hill Gang's "Rapper's Delight," was very melodic. Furious Five's "The message," was melodic. Almost every song by Whodini is melodic.