Tweet from the Nokia Symbian Signed team:
That was it; we are officially closed. Thank you all for the past years!
— Symbian Signed Team (@SymbianSigned) January 2, 2014
As far back as October 2013, Nokia had published that developers will be unable to publish new Symbian and MeeGo apps to the Nokia Store from the 1st of January, 2014:
If you have Symbian and MeeGo content in the Nokia Store, it will continue to be available for download to customers, and you will continue to receive download and revenue reports as well as payouts for downloaded content. However, starting January 1, 2014, you will no longer be able to publish any new content or update existing content for Symbian and MeeGo.
Yes; it is time for Symbian and MeeGo developers to move on.