For beginner training, general rowing and baggage tours.
Even on Lake Constance, the Müritz or the Baltic coast, you can still row this boat in a relaxed manner.
This boat is also well suited as a universal boat, as it is almost as fast as a usual C-boat.
If 90cm boat width is not enough for you, you should take a look at the D-double with cox, boat width 113cm. That should be enough even for expeditions.