I was at Henry's camera store the other day and talked with a sales guy who asked me how I liked my Nikon Z7. He said that he bought a Canon mirrorless himself cause it was a little cheaper and came with a 24-105mm lens).
The one thing he liked about the Canon was, it had a shield that automatically covered the image sensor when you removed the lens. What a great idea, considering the the sensor on my Z7 is only 16mm from the opening. I think this should be implemented on the next version of Nikon's mirrorless cameras.