I think this is a good move, it means that MIR is dead. MIR created an unnecessary rift in the Linux ecosystem. In fact we should have started moving to Wayland years ago, the fact that we are just NOW beginning migrating over is pathetic. We should have started earlier and dealt with the 'pain' that such an architectural change brings rather than dealing with it now. In fact MIR probably caused some of this delay due to the uncertainty that it created for driver makers.