Per contra, the Korn shell (ksh) is, AFAIK, the only Un*x shell whose built-in language is truly designed for programming. The Bash language is much simplified, and (IMHO ...) is generally designed for stringing other commands together.

Sorry, but this is nonsense: bash is essentially a superset of ksh.

Curiously, this is exactly the same nonsense that I corrected you on Nov 10 2014. Did you not read my response? Did you disagree with it, yet ignore it? Or did you simply forget the whole incident ever happened?