As such, I believe there should not be such a thing as RT, and all RT games should come with pausability.
Real Time games are real-times games, because timed physical imput is core part of gamplay design. Adding pause to a good real-time game makes as little sense as adding pause to Doom - it defeats pace and bypasses intended systems. Add pause to something like Starcraft and entire game falls apart. Sure add different speeds, but never a pause.
@Emrikol is absolutely 100% right on target, no matter if one enjoys STwP or not.