No, just until it's no longer commercially valuable, defined by when they're willing to release all of their source code for both client and server.
[https://support.apple.com/kb/DL461?locale=en_US]
It's pretty much a paperweight at this point.
Companies should be required to release everything a costumer needs to build and use a new update for their own device or software after EOL. This means source code for relevant servers and clients, signing keys, device communication tools, the whole lot.