It's sometimes a bit convenient if you want to read file from the directory the script is stored in. Overall I found it more confusing and awkward than anything else, and prefer setting it explicitly. It's still okay for a quick script though, but as general "best practices" advice: meh.
I also think so. Often script needs to access a file in actual current dir (for example a config file) or process files with relative paths supplied by user and changing working dir makes this hard.
I think an easier way is to find script's location and construct paths for accessing script dependencies, for example (works on Linux & macOS):
I agree, getting to know where a script "comes from" can be complex though. You can `readlink -f` (or equivalent) in many cases, but when implementing a library this might not be entirely practical. I have had to rely on this ugly if-statement [1] for that purpose.
