Separate translations folders for sub-modules?

Hi,

We have a discussion going on at http://drupal.org/node/446360 on whether it is required/better/advisable... to have separate translations folders for each sub-module of a module (each with their own pot/po files).

My opinion is:

1. For smaller modules with few translatable strings this is overkill.
2. It also makes it harder to maintain a consistent translation across all sub-modules.
3. Importing all the translations for one module becomes more difficult.
4. Splitting up translations between sub-modules might be wise for really heavy weight modules like CCK, Views and the like. (For a discussion on the general problem of - too many - sub-modules see http://drupal.org/node/437536.)

What do others think?

Cheers,
Frank