I was looking for some flights to the US and it seems that SAS now offers flexible conditions for all booking classes from V and upwards. This also includes the "discounted" B- and Z class. By flexible they mean for a fee, of course, and I don't know the fees' size. Even though competitors like LH have offered this on most booking classes for years, it still has to be considered a late, but welcome change from SAS.
According to my TA, my "discovery" is confirmed in writing by SAS Sales Information.
What's next? 100% earnings on all booking classes and SFO as new IC-destination?