The most prominent changes in version 1.10 are about improving multiplayer: there is now a new utility called Shell for operating servers and several multiplayer-related bugs have been fixed.
However, even more work has been done under the hood: we've been building the foundations of our next-generation UI framework and enhancing the management of surface materials in preparation for future work on the map renderer. Also, in this release we've completed a couple of important long-term roadmap items: the multiplayer server is now its own independent executable and we've cleaned up the runtime public interfaces of the engine.
Prompted by the accelerating speed of development and how impactful the changes have been recently, in this release we bump the minor version number for the first time in many years.
If you are upgrading an existing installation of Doomsday, note the following: