I worked today on the "pages to delete" category.

many of these pages are in fact renamed pages, when probably the author didn't know about page move and made a cut/paste in place.

it's much better to use a redirect. One must only take care from time to time of the page "double redirects" or "broken redirects", but the redirect uses very few space and energy, so there is very little need to delete the #redirect pages.

However it's probably usefull to effectively delete the localisez pages (IT, TR) when the localised wiki is up (the redirect don't seems to work with interwiki links), or simply replace them by a link to the localized wiki. this could be better done by a native langage user :-)

I mostly use delete when there are multiple move due to typos or spelling changes made in a row (I have often spelling problems :-) the bitTorrent spelling was specially difficult for me :-)

AFAIK no page is never really deleted, as we can undelete a page, it's still here in the database, so the delete only clean the "all pages" special page.

this is a mediawiki drawnback, the database is always growing with any edit (I know some users have very huge databases :-(. But like this nothing is never really lost :-)

jdd