they are very prone to making code extremely brittle
Yes, it is true, but it largely depends on what the change are and how they are made.
In the case of Nice::Try, the changes are carefully implemented and minimal and the module relies on PPI, which is way much safer than using regular expression.
Anyway, try it, and you will see it is quite stable, but if you have any suggestion for improvement, I would very much welcome it.
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