The problem with adding a potentially long prefix (the options page slug) to an option_name value is that by default option_name in WP is limited to 64 characters.
This might not be a problem in a lot of cases, but when added to the way that repeater fields, or nested repeaters are stored it can become a problem that I’ve actually run into when building custom plugins and themes using ACF, and that’s without including a prefix for the options page name.
