Minor tweak to default htaccess file

The default .htaccess file has the following directive:

# Set the default handler.
DirectoryIndex index.php

Using this on a site that has other subdirectories with 'index.html' instead of 'index.php' will make those directories unreadable. Would it be a trouble to include other files in DirectoryIndex in the default installation of Drupal?

Example:

# Set the default handler.
DirectoryIndex index.php index.html index.htm