I noticed after upgrading to OSX Mavericks that shiny, new versions of many iWork and iLife apps had appeared. Yet, the old versions remained installed. All the new versions seem capable of opening (and in the case of iPhoto, upgrading) old version ('09, etc) documents/libraries. They also seem capable of saving in these older formats.
Is there any reason to keep them? Or should I simply drag the old versions to the trash?
If uninstalling is the right choice, is there anything that needs to be done other than dragging to the trash?
Is it possible to remove the old versions, but retain the templates and other data specific to the old versions? The new templates are stellar, but being able to keep the old ones (e.g., in Pages) would be a nice bonus–double the templates.
Lastly, is there any impact on iCloud in doing so?
Any other thoughts between the versions, and keeping vs/upgrading? I have Time Machine backups, anyway, so I can always go back (presumably) and restore them should I need the old versions in the future.