If you look at Overall Shipments, note the narrowing gap between Canon and Sony. Sony, Nikon, and Fujifilm are all trending up, but Canon has a slight trend down. I'm not sure why this is, but of all the start-up pro photographers I personally know, none of them are going with Canon and their number one reason is the lack of third-party, full frame lenses, such as Sigma. I'm very heavily invested in mirrorless Canon equipment but in my conversations with photographers starting professional work, I now recommend Sony or Nikon, solely for the lack of of third party, full-frame lenses for Canon. I follow a few YouTube landscape photographers. In the last two years, almost all of the Canon DSLR YouTube influencers I have followed have now switched to Sony or Nikon. These people are significant influencers. The consequences of this are not large to start with - almost flat in the short term, but when they stay flat or start trending downward, there can be an accelerating effect, resulting in an increasing narrowing of the gap as we see in that graph. I gave Canon a two-year grace period with the expectation that they need to get their new RF lenses up and running and not let the competition in too soon. But that grace period is long gone now. I've been a Canon user since the 80's when I purchases my first F1, but even though I'll still be with Canon for the long haul, thanks to being so heavily invested in their new RF cameras and lenses, I have been recommending to all the up and coming pros or semi-pros to look at either Sony or Nikon and not to make the same mistake I have made re. this imaginary 'grace period'. I think Canon equipment is absolutely first class, but they need to drop their protectionism when it comes to full frame RF lenses. In the meantime, I'm praying they release a 14mm or 15mm f1.4 for night scapes.