> You could change the option to hide file extensions in the explorer settings windows; no registry tweak was needed.

The is a setting in Explorer, but it does not affect all file types; some (such as .lnk) are not affected by that setting and hide the extension anyways.

I don't have strong feelings either way, but I can see the perspective that underscores should suffice, and that introducing white space into filenames makes certain file and data management tasks more difficult and unpredictable.