Back when Perl was the language of choice for bioinformatics, I found a huge performance boost pre-processing large (~1Tb) text files using built in unix tools like sed and awk with regex. So while it might take me a full hour to peck out the correct incantation, the task would then run in an hour, compared to four hours or more for the same task using Perl.
I play with it sometimes, kinde like some of the syntax, especially regex and ;.
I tried doing regex with sed when working on one personal script, but was getting errors way too often everywhere. Perl did what I wanted in a few lines and gave me desired output, so I just used that.
Imo, it doesn't really matter what you use for writing code for your personal use as long as it works. : )