With our recent release of Snort 220.127.116.11, as I stated in a previous blog post, this marks the beginning of the "end of life" for Snort 18.104.22.168.
We've updated the Snort EOL page today which marks the EOL for 22.214.171.124 (2017-03-14).
If you are interested on our "LTS" or Long Term Support version of Snort (126.96.36.199), I suggest you plan your migrations now.
188.8.131.52 will be supported until the next major release of Snort after 184.108.40.206.
If you want the newest features of the ruleset and Snort, we suggest you upgrade to 220.127.116.11, which is our current release. For more on the features of Snort 18.104.22.168, please read out blog post.
Please remember, as per my previous blog post, 22.214.171.124's ruleset will not be backwards compatible to Snort 126.96.36.199 once the newer keywords are used.