[JohnFen]

> Personally I’m not a fan of shell environment customizations like this because they are often fragile and may vary between systems.

True. I gave up the practice entirely many years ago for a slightly different reason -- I need to use many different systems on a regular basis, and don't want to get used to using something custom that won't exist on random system X without customizing it, too.

Often, I prefer predictability and stability over convenience.