Firstly, I'm glad this finally worked for you.

"the following version is also agnostic about the perl version"

Leaving out a "use VERSION;" statement does not achieve this; nor does adding a "use feature LIST;" statement.

Your code will have problems with older Perl versions. Here's a non-exhaustive list:

• Subroutine signatures were introduced in v5.20.0 (see "perl5200delta: Experimental Subroutine signatures"). I added information in the OP on how to deal with this.
• I didn't really expect anyone to wind back v5.36 to a pre-5.10 version, so I made no comment about that in the OP; however, say() was introduced in v5.10.0 (see "perl5100delta: say()").
• And for the same reason as the above point, I didn't mention that IO::Prompter requires v5.10.0 (see the first line of its source).
• And, in the later fix for the MSWin bug, \R requires v5.10.0 (see "perlrebackslash: \R").

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