I do not agree with the premise that there needs to be a negative repercussion to doing something before we look at examining the behavior.
I guess I could do some serious gymnastics and reach for something like “when a text file is longer than your terminal scrollback and you cat it, you lose history that you may have been expecting to reference”.
Many of the sort of examples I’m referencing involve spawning subshells needlessly, forking/execing when it’s not actually needed, opening file descriptors that otherwise wouldn’t have been opened. We’re in an interesting bit of the tech timeline here where modern computing power makes a lot of this non-impactful performance wise, but we also do cloud computing where we literally pay for CPU cycles and IOPS.
I guess I’m just a fan of following best practices to the extent practical for your situation, and ensuring that the examples used to inform/teach others show them the proper way of doing things.
No bad things happen when I pour a Hefe into a Pilsner glass either, but now the Germans are coming for me.
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