My recollection is that someone adopted the ksh93 tree and started making incompatible changes, which were picked up by some distributions (Debian I know) and b

My recollection is that someone adopted the ksh93 tree and started making incompatible changes, which were picked up by some distributions (Debian I know) and broke things. I use ksh93 as my primary shell, interactively and for personal scripts. For scripting, a killer feature is the declarative `getopts` that makes it trivial for even the quickest dirtiest script to have full command line option handling including help.