For the very few who still use Windows Phone 7, we've got some good news for you! Microsoft has extended life support for the aging operating system until October 14th 2014, meaning you get a few extra weeks of life support until Microsoft gives up on it. It's not currently clear why Microsoft has done this, but I'm not complaining.
Windows Phone 7.8 was the last edition of the Windows Phone 7.x series before Windows Phone 8 was launched. Windows Phone 7 handsets were unable to be upgraded to Windows Phone 8 thanks to the change in architecture. Those who still cling onto Windows Phone 7.8 haven't seen many updates since its launch, so this extended life-support isn't going to do much.
You can check out the updated date on Microsoft's "Product Lifecycle Search" page. The date for the life support has been set to 14/10/2014. We're not sure if Microsoft have any real reason for doing this, perhaps they have one more update they want to get out for the operating system before it's officially out of support?