Just a bit of a context to why even have a need to write a bash script.
I mostly write automation, for windows in powershell, for linux in python. and mostly leveraging ansible.
However the need was to have a script that can be deployed to server using azure custom scripts extensions. My first idea was to simply have a thin wrapper above my python scripts, that wil install what is needed and then launch python goodness. however this proved to be a bit frustrating, because different systems have different package names, dependencies and etc.
as soon as you have to support ubuntu 18.04/20.04, red-hat/centos 7 and 8, openSUSE, oracle linux and some more…
on one system there is only python3, on other only python2, on some python3.5 on other python3.8, on some package is called libselinux-python, on other python3-selinux and so on 
I just said screw it, will write this in bash and be done with it, I can be sure, that will work reliably on every system.
my wish for 2021 is to get rid of python2 and be done with this nonsense and have everywhere only python3 so we can finally count on it in our automation 
PS: sorry for a small rant