According to The Verge’s Tom Warren, Windows 10 is done, having reached RTM status with build number 10240.
Windows 10 is a dramatic departure from prior Windows versions. The new operating system is designed for constant update, with Microsoft pushing the concept of it being more like a service than a discrete piece of software. The company is also offering free upgrades for a year to most PC users, in hopes of creating an updraft in use that can be leveraged into attracting more developer attention.
In the future Microsoft will be updating Windows 10 regularly, especially the built-in apps that power most experiences in the operating system. Microsoft will test these future updates with its Insider program first, before rolling them out more broadly over the coming months.