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.
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.