82 votesceebee commented
I second this.
It'd be nice to have the option of having an expired custom post type be set as another Custom Post Type. i.e. a post under an Upcoming Event post type would change to a Past Event post type.
Currently doing this with Categories, but would be great to have the option of doing it with CPTs.
However, I've seen that the plugin Post Type Switcher has conflicts with the Advanced Custom Fields plugin (basically turning your ACF group into a post, which totally destroys it) so maybe this is a more involved feature request than it seems. But it'd be cool if it were made to work.