To add to the great response from @confusedpuppy@lemmy.dbzer0.com, amber would address one thing only: writing the syntax.

Most people don’t need it, and even if they had it would break the compliance in other ways besides syntax, but I’m sure there are people out there that know what they are doing who would appreciate amber.

Amber will still support bash stuff, or perhaps even other non-posix shells through the use of flags.

I get why this is useful, and it’s useful for me as well, but the perfectionist in me asks why target bash instead of posix?

I’m guessing he’s alluding to a bunch of asserts, data sanitization, and granular error reporting. But yea, who knows.