Thanks for the question. I tried to summarise in one line the single
most compelling reason to upgrade to each recent MediaWiki release at
<https://www.mediawiki.org/wiki/Manual:Upgrading#Why_upgrade.3F>.
More detailed "selling points" are in the wiki pages about each release
and in bugzilla. What's convincing varies a lot depending on people;
good luck, and let us know (e.g. on talk page) what convinced your
management!
Nemo
_______________________________________________
Wikitech-l mailing list
Wikitech-l@lists.wikimedia.org
https://lists.wikimedia.org/mailman/listinfo/wikitech-l