A lot of my software is out of date so to speak. But it keeps working and that alone keeps me off of some of the upgrade paths. 8.5 has a stellar reputation now, not sure if it was praised all that much when it was current. Funny how those things work. 

My second-most-important audio software is Adobe Audition, also abandoned and unsupported. But it does what I need it to do, and it didn't suddenly stop working the day Adobe EOL'd it.

For a while I was using CD Architect from Sound Forge 4. That's from, I think circa 2004. Since then I've upgraded, but any CD made with the newer version sounds exactly like one made with the old one.

I still use Ozone 3 from time to time, and I'm pretty sure iZotope does not support it. Still works, though. In fact, I think I still have a copy of Ozone 2 around, and I'll bet it still works, too. 

I have old projects that used Kontakt 2. Still works. In fact, there are instruments in there that NI doesn't ship anymore. That's why I still keep it on disk.

I even installed a copy of Cakewalk for DOS 1.0 a few years ago just for grins. It worked, too!

And yeh, I'll be on 8.5 until it either stops working or X3, X4 or X5 finally offers something I really need/want.

I just wish that the 8.5 upgrade offer was still on.  I missed the boat on that one.  I don't care about lack of support if the software still works.