http://www.perlmonks.org?node_id=747343


in reply to Re: Will the real Internals module please stand up?
in thread Will the real Internals module please stand up?

They could have been included in the module, the same way that there are utility functions in the charnames pragma that you can load without triggering the pragma behavior via "use charnames ()" or "require charnames".

So either it was just a "speedier alternative", as you say, or it was desired that the module not need to be loaded. I can't guess which.