I see a disconnect between the blockquote and your question. The blockquote discusses the practical pitfalls of using a language with as little style enforcement as Perl, and you ask when we can start using convenient, new-ish features rather than restricting ourselves to old Perl.
I do not believe that Perl's newer features, while wonderful in their own right and supportive of good programming practices, will eradicate the problem traced in the quote. Undisciplined programmers will still generate undisciplined Perl code, and Perl is a language where undisciplined code can really sting.
Had non-strict coding been end-of-lifed, I might see light at the end of the tunnel, but short of a coup like that, I see the new features helping the disciplined coders more than anyone else.
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