Where to find which version is currently supported (or out of support)

[HenkJan]

As Ruckus noob I am trying to find the location where I can find the current supported versions by Ruckus.
(I know where to Download them) 
Reason is I am currently writing a document why the current (old) version should be upgraded and wanted to use "currently not supported anymore" as an argument.
But I don't know this for a fact so I tried to find this on  https://support.ruckuswireless.com/ but being not familiar with this website I got lost. 

So before I am stating something as a fact (used version of almost 6 years old) not being supported I want to refer to an official Ruckus website / document that proves my statement. 

Anyone ?

[Edit] 
My post is unclear I see on the answers. let's make it shot and simple: 
I found the hardware EOL / END of Support document. 
I am looking for the same but then in regard to Software/ Firmware versions.

[syamantakomer]

If a old device is EOL/EOS, you can find the EOL/EOS document under product >> Choose the product >> Documents

I am not sure if there is a single document for all the old devices, but if you can provide me a similar document from another vendor, I can check internally and see what we can do or if there are any improvements required.