So after a quick reality check: Better HW availability has been positive for MorphOS, lower price has been positive for MorphOS, better bang for the buck has been positive for MorphOS, in short: the Mainstream path was positive for MorphOS, not negative!
from your graph, i dont think the growth is all that impressive. there were plenty of people at the time when mos became available for mac minis etc, who had old machines lying around but the price of morphos was too high for them (not to mention people questioning the licence etc). the graph could have looked significantly better imho. I think morphos could have a userbase of many times the current amount with a different model.
