&#62; While you can’t get code into your templates, it’s easy to get UI into your code, which is (almost) just as bad.<p>I looked at Lift a year or two ago and this was the showstopper for me.  While there's a cleanliness and purity to rigidly enforced templating I have never developed a web app where I didn't need some kind of creative "UI" logic somewhere.   If you can't put it in the templates then it doesn't go away ... it goes into your core code where the poor schmuck looking at the template has no hope of doing anything with it.  For me, putting what is otherwise pure UI logic in the UI layer is a lesser evil than having it permeate back to the middle tier or "view" code layer.