Not really fishy. The 6.3.x series is the only version that is under active development [1] so quite naturally it follows that at least since 2013 (EOL of 6.2) many users have upgraded to the supported version.<p>A bit more disturbing IMHO is that you need an active support contract to even get the updates (based on information I got from Juniper customers, I couldn&#x27;t find a direct confirmation on their site) meaning that aftermarket users are left in the cold.<p>[1] <a href="https:&#x2F;&#x2F;www.juniper.net&#x2F;support&#x2F;eol&#x2F;screenos.html" rel="nofollow">https:&#x2F;&#x2F;www.juniper.net&#x2F;support&#x2F;eol&#x2F;screenos.html</a>