a37e19b5____Software_made_the_wiki_way___Main_concern
[Reason] Because they are cool! [Strategy] Upgrade to the new stable version every 6 months. Depending on your eagerness vs tolerance to bugs (capacity to fix them), you may want to skip .0 versions [Main concern] 
I want the new features
Version Lifecycle | Tiki Wiki CMS Groupware - Software made the wiki way.
Main concern