Hey so I'm running 1.4.11 and I am hesitant to upgrade to 1.6 due to the numerous plugins I've already installed. Is security going to be an issue if I stay at 1.4.11?
There have been security fixes since 1.4.11 believe.
Most plugins will be compatible.
No, but support will be in the future. Just do the upgrade. It is well worth it and all the plugins will work with a few tweaks, if not, 95% of them will.
Its highly recommended, you only gain things with 1.6
At minimum upgrade to 1.4.14...