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Removing structural typing wouldn't be an improvement to my mind. It's the sort of thing you use maybe once a year, but when you do it's extremely useful to have around. It's a bit like saying that removing the ternary conditional operator in Java would make a big difference to developers' lives.

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I think the kind of features you use maybe once a year are a bad thing to have in programming languages - ease of reading is more important than ease of writing.

I should also point out that it's a feature which I don't believe detracts from readability. It's pretty clear from looking at code which uses ST what it does. There are examples in this thread.

It's a feature that you will use directly maybe once a year when adding it to a library, but I then use that library (and indirectly that feature) virtually every day. YMMV but we've found it very useful.

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