Previously it has been told that to unset one branch takes about 4 days. But in my selected branch it is possible to unset only the latest upgrades. One by one. With each upgrade's unsetting time of 100 hours (99:99:99). So that is 19 upgrades in total with 1900 hours or 79 days worth of waiting.
79 days is not a 4 day long period as announced earlier, is it?