Keeping the old but adding the new would be, by far, the best alternative.

You did not read my post. I suggested adding links for all releases that have documentation on perldoc. The oldest is 5.004, the newest is currently 5.7.3, but I expect it to be 5.8.0 soon.

Getting up to Perl 6 is several years away from common acceptance, for the multi-national that I work for.

That is great! Maybe it will be accepted as soon as it's released, which would be wonderful! For your information: Perl 6 hasn't even been designed completely yet.

Transitioning scripting from Perl 5 to Perl 6 will require access to Perl 5 documentation.

Just as a side note: all documentation is distributed with perl itself, so you probably have the documentation right there on your hard drive. Besides, perldoc.com will hold old releases for a long time.

5.) etc, etc, etc.

Please do tell, as your 4 other points weren't too useful.

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