I have been following this advice for about five years with my scripts and the best result has been compliments from co-workers and others who have picked up the scripts and felt like they had a much better understanding of what the scripts were doing.

Combined with use of shellcheck and shfmt working in shell scripting has come a long way in the last couple years. I still feel like BASH is a dead end--the quoting and whitespace issues combined with the bifurcation caused by Apple not shipping Bash 4.0+ make moving to Python probably the better course in 2020.