Reactive coders instead centre their coding on their data flows.
In the increasingly async coding environment in which we all work, this is a really interesting way forwards - it's probably the way most of us should be thinking.
One problem, however, was that the Reactive libraries themselves require the new style PCLs - like those in Profile78 - so they didn't work that well with the existing MvvmCross codebase which uses Profile104.
Rob Fonseca-Ensor - @robfe - tackled this problem head-on - he ported Rx back to 104 and then shipped this source back to the community - https://github.com/robfe/PortableRx
This shift from
System.Reactive -> PortableRx.Reactiveis truely awesome. I really look forwards to using it.
It's a huge pleasure to hand out a big reactive badge of awesomeness to @robfe :
One more note - if you are interested in Reactive coding, then another interesting project to track is ReactiveUI - https://github.com/reactiveui/ - which is also shifting towards PCLs :)