threading. The Classic Mac OS offers preemptive behavior — since 1984! “Preemptive behavior has been present in the Mac OS since System 1.0,” says Jonathan ‘Wolf’ Rentzsch, creator of Red Shed Threads ...

This seems to be happening more often. When I search for a contact to see the latest message thread with them (someone I've texted for work regularly with for over 5 years), it shows his name with "35 ...

I really do hope there are some significant moves forward in the "completeness" of OSX although I have to say, it's more complete and functional NOW than I ever imagined it would be at the 10.2 stage.