I just hate this kind of selling “tricks”, where you basically force people to buy your newest gear by not updating the older ones.
I hardly believe that the programmers who work at Steinberg would have a problem releasing a new software/driver compatible with Mojave!
For God’s sake, macOS 10.15 is almost here and we still haven’t got a driver for 10.14. Talk about appreciation for your customers… people paid 800-1000€ for the MR816CSX and are very happy with it, but they are slowly being forced to dump it, or stop updating their macOS (which would sooner or later result in some apps not working anymore aso.)