I was wondering whether anyone would point out the Python pickle, which is often used for saving trained ML models in .pkl files. I mean, at this point almost

I was wondering whether anyone would point out the Python pickle, which is often used for saving trained ML models in .pkl files. I mean, at this point almost every memorable 3 letter file extension probably already has some claim to it, but still, it would have been nice if Apple had done some research and made this more unique.