Purity won't cure the world of all it's ills but it may fix a bug or two before it hits ... well the developers consciousness let alone production.

I am genuinely interested in your point about trampolines and can you give an example? In Haskell foldl' for example allows you to process a big finite list quite efficiently without trampolines but yes the name of the function is a bit sucky I admit.

It's funny how you can criticize trampolines but then imperative code like this:

    var sum = 0;
    for( var i = 0; i < elmt.length; i++ ){
        sum += parseInt( elmt[i], 10 ); //don't forget to add the base
    }

    var avg = sum/elmt.length;

    document.write( "The sum of all the elements is: " + sum + " The average is: " + avg );

Is a tramp in disguise!