The Qt project releases the last feature version of the Qt 5 series, version 5.15, and in the future its focus will shift to the next big version, Qt 6, which is expected to be released by the end of the year. Qt 5.15 is a long-term supported version that provides 3 years of support to commercially authorized users and is fully compatible with previous releases of the Qt 5 series, the main work of which is bug fixes, which are considered to be the most stable version of the Qt 5 series. Developers say Qt 6 will change significantly, but it will work to make it easy for the code base to migrate from Qt 5 to Qt 6. One of the main changes in Qt 5.15 is to provide the basis for Qt 6: the introduction of an abstraction layer, Qting Hardware Interface (RHI), for different graphics APIs such as Direct 3D, Metal, Vulkan, and OpenGL. (Solidot)