Consequence of English not being my first language, and "indentation" being way too similar in it. I just can't spot the change.
I've seen a couple of proposals, yes they'd work, but they seem to be always ugly. But the problem is not that significant indentation makes it hard to create lambdas (Haskell's ones, for example are fine), but that it's hard to think about rules that won't create some kind of problem. On Python it's lambdas, on Haskell it's that they are often actually harder to write than explicit blocks (good thing Haskell has explicit blocks too).
And no, computers don't deal fine with it. To minimise some Python code you need almost an entire Python parser. Assembling Python code from small pieces (something that is really important for Javascript) is a frightening problem.
