Why have a separate package for every file in a project?

A current project's goal is to take two sets of requirements (old and new). Find the best matches between them. Major subtasks are:

I'm putting each of these in a separate file; files run ~350 lines each.

All the tutorials and examples (e.g. perltoot) show a different package for each file (something like RqMatch::InSanity, RqMatch::Weight, RqMatch::Matches, RqMatch::Report). And the modules that I've downloaded from CPAN mostly follow this scheme.

Why? Why not just put them all in a single package? The project isn't large enough for naming collisions to be a problem.

Suppose I use the same package throughout. During development, when I notice that a file has grown large enough to become unwieldy, and has developed two separate themes, I just create a new file and move some of the functions / methods over there. I don't have to do any package-management to my existing files. But if I give the new file its own package, then I have to doublecheck all the places I've invoked those functions. What does it buy me?

In reply to Package Proliferation by throop

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.