According to http://noc.wikimedia.org/conf/CommonSettings.php.html , all Wikinews, all Wikiquote, all Wikibooks, English & German Wiktionary and Serbian Wikipedia have the extension DynamicPageLists enabled.
In Bugzilla there are 16 specific projects with open requsts to use this extension. Probably more would request it if they knew about it.
What is the difference between WN, WQ, WB, en.WIKT, de.WIKT, sr.WP, and the projects below?
Which metric can be used to judge if a project can or can't use DPLs?
At the moment it seems whether or not a project has this enabled is arbitrary, and it's quite frustrating if users have no idea if this functionality will ever be enabled.
The bugs and some relevant comments are listed below.
thanks, Brianna user:pfctdayelise
Bug 3169: Enable DynamicPageList for Wikibooks [presumably en] Bug 3533: Install the DynamicPageList2 extension on Latvian Wikipedia Bug 4468: Install DynamicPageList2 on Japanese Wikinews Bug 4847: Enable DynamicPageList on nlwiki Bug 6163: Install DynamicPageList on Dutch Wikipedia Bug 6758: Activation of DynamicPageList2 on de-Wikisource Bug 7952: Install DynamicPageList extension on Icelandic and Spanish Wiktionaries Bug 8240: Set up DynamicPageList on the Bosnian Wikipedia (bs) Bug 8261: Install DynamicPageList for Commons Bug 8563: Activate DynamicPageList2 or DynamicPageList on en-Wikisource Bug 8672: Install DynamicPageList2 on all Wikinews projects (requests specifically from FR, IT, PL, Bosnian) closed WONTFIX Bug 8886: Install DynamicPageList extension for Vietnamese Wiktionary
Kellen (2005-09-22): I was informed in #wikimedia-tech that DPLs are inefficient and experimental and therefore would not be enabled on WB as the site is too large. =( Resolving as WONTFIX.
Brion (2006-07-05) in reply to Kellen: It should be ok on Wikibooks; we can always turn it off later.
Rob (2006-12-18): We don't normally enable it all over the place since it's quite expensive to run and not necessarily appropriate for an encyclopaedia.
Brion (2006-12-18): We probably will never install DPL2. DynamicPageList itself is kind of unreliable. Most likely a replacement for both which is more targeted and works more cleanly would be better.
Brion (2007-04-24): DPL2 will not be installed anywhere. If specific things are required, small, clean, purpose-built extensions which have known performance characteristics are preferred.