An issue with your graph (cool and interesting as it is) is that your axes may not be uncorrelated which may, alas, explain the gap: it may not be feasible to combine those elements in such a way. Not convinced of this, but still more likely than the discovery of a huge gap that no one thought of plugging.
An issue with your graph (cool and interesting as it is) is that your axes may not be uncorrelated which may, alas, explain the gap: it may not be feasible to combine those elements in such a way. Not convinced of this, but still more likely than the discovery of a huge gap that no one thought of plugging.