Microsoft reveals not all Lumia devices are getting Windows 10 Mobile

Owners of Lumia smartphones other than Microsoft's latest 950 and 950 XL are in for some disappointment today. Well, make that further disappointment. After a very long wait and Microsoft's continued promises that all Lumia devices currently running Windows Phone 8 would be updated with the new Windows 10 Mobile operating system, the company has revealed that won't be the …