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by chasil 3112 days ago
There are TONS of advantages to ksh93 over bash.

-Floating point math, not just integer

-Coprocess syntax that is correct and compliant

-Genuine Korn retains variables in control structures

-Lots more, detailed in the Korn & Bolsky ksh93 book

The language specification for ksh93 is large and powerful, and bash doesn't approach it.