I think it’s not a bad idea. No features have been removed, only moved. It’s incumbent upon the developer to do a local library with tools like local::lib, perlbrew, and Carton. And that should be done anyway to control versioning, upgrades, bugs, and accidental regressions. The customer should never need to know anything about that level of the code and you can have a shiny new or version specific CGI and perl to your heart’s content. And you can always cut and paste the entire CGI.pm into your code if the other strategies are too much to to handle.

The refusal to embrace new deployment strategies is something that can enforce perception of Perl as antiquated. Move forward, you’ll find the tools afford much more than they cost.