Last modified: 2014-02-28 23:44:54 UTC
Perhaps when the [[WP:Tutorial]] on enwiki is updated for VE, we will want to enable VE on the tutorial sandboxes. Also, when VE is enabled for anonymous editors, we might want to turn on VE in the enwiki [[WP:Sandbox]], because otherwise anons won't have anywhere to play with VE (they cannot create user pages). Perhaps a category (similar to the way AFTv5 does it) or MediaWiki page (like Echo blacklist) would be the way to do it.
For the record: on ptwiki we also have a few sandboxes on Project namespace: [[pt:Special:PrefixIndex/WP:Página_de_testes/]]
While bug 55900 now allows logged-out users to invoke VE in the namespaces where it is already available, in the meantime I hope communities created temporary sandboxes in one of said namespaces :) (The Italian one did, it's basically a subpage of mine).