And I'm thinking of building a "local storage" manager in TiddlyWiki. (Maybe something already done, but a fun "brain-age" exercise.)
Kind of like a file manager, but rather a "key/value" manager.
You want to manage your local storage items for all of the TiddlyWiki instances (and whatever other web pages) at a particular host/port? Just drop the TiddlyWiki local storage import into a TiddlyWiki that is "there".
Manage the key/value pairs (whatever you would do in a file manager), export/backup, print. Drag some key/values showing in one Tiddly Wiki at a host/port to another TiddlyWiki at some other host/port for local storage related to that. Anything at all.