It would appear that a total of four snapshots were released between December 15 and December 21, snapshot 20171220 being the last one available for OpenSuSE Tumbleweed. And they include a few interesting things, such as the massive KDE Application 17.12.0 software suite for KDE Plasma 5 users. Apart from KDE Applications 17.12.0, openSUSE Tumbleweed users got a new kernel, namely Linux 4.14.6, and a bunch of other updates like D-Bus 1.12, CMake 3.10.1, and LLVM 5.0.0. Other than that, it looks like the Qt 4.x application framework was ported to OpenSSL 1.1, which is now enabled by default in the distribution.