I have an old SA-3000 that was replaced by my current 4000. I was using it for testing upgrades, but apparently its a boat anchor now since the platform is not supported by 6.1 and newer OS.
I think you can learn a lot from the lack of response.
My only suggestion would be to think of a "nice to have" use which needs no functionality beyond release 5 and which you could afford to lose with no notice. EOL doesn't mean kaput, but you have to be ready for that.
