Interesting stuff, but given bash's

- Relative unportability - Poor noncompliant sh interpreter - Poor performance (can be 4x slower than POSIX sh shells like dash for certain tasks)

I personally think bash is always the wrong choice. Use POSIX sh (or a real language). POSIX sh is 98% the same thing, there's no good reason to even use bash over sh in the vast majority of cases. It's just this blight that won't go away.

Given that bash is mostly sh anyway, most of this writeup applies to sh, too. AFAIK the only thing bash-specific here is arrays.