Good news for TramSim drivers: the new U2Z tram line is available as a free update. You must have seen an update 1.4.1 in your Steam download lists.
This new route of the line serves as an additional service on the Ringstrasse replacing the U2 metro line in Vienna until autumn 2023. This new U2Z route is available when selecting in the main menu as well as in the window schedules. Update 1.4.1 also brings its fair share of minor fixes but still doesn't fix our performance issue when using VR.
For the full changelog, it's this way.