Looking into installing Solr on Debian, I've noticed the Debian packages are all for Solr 3.6.2, which is positively ancient, considering the latest stable version of Solr is 6.3.0.
Is there any reason I should stick to the Debian-packaged version? My instinct is that such an old version should probably be avoided, but installing from official packages has its advantages.
Also, what is the reason for Debian having not updated their Solr packages for so long?