[lmm]

Makes me think of the smalltalk approach to branching, where it's there, but just another method call (on a boolean) - rather than

    if(a > b) {...code...}

you do something like

    (a > b).ifTrue({...code...})

I think it's an approach more languages should use - it means there are fewer special cases in the syntax, and you can compose conditionals or use them in higher-order functions more easily.