I love it. Usually I use in an text editor to create or modify large amounts of text. Sometimes I create sequences in Excel (yep, Excel) and then apply RegExes to it to build some JSON out of it. I rarely use it in production code, because readability and maintainability is much more important than short code.
Just today, we refactored a 3 line regEx to about 100 lines of code which is longer but much more comprehensible.
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