Yes, perl regex options are great for commenting and overall it's one of best things about the language. I also will paste one or more commented example lines

Yes, perl regex options are great for commenting and overall it's one of best things about the language. I also will paste one or more commented example lines of above my regexes so it is clear what kind of input you are expected to be processing, it always ends up being a time saver when debugging or updating code.