this article. Canon 4-5 days per repair, Nikon ~24 days. Granted, that article is ~3 yrs old at this point. But I pretty continually hear things in Lensrental blogs that reaffirm Sony/Nikon having repair center issues and Canon being pretty darn good.
As for niche, I was talking about the one I was trying to fill. I am still building my kit around Canon FF bodies. My next body will likely be a 5DIV. So the niche I was looking to fill was not a primary body, but rather a secondary or backup body that was smaller/lighter and had a few things I do not have on the 5DIII such as a flip screen, etc. Something that I hope to use maybe 10-20% of the time, up from 4% in 2016.
As for what you are doing....it sounds to me like you might not need to swap systems, but just invest in a second smaller system. This is essentially what I have done as well as a few others. Over in the "What was Used" thread, a couple of forum members were using an M2 and A6000 for a pretty significant percentage of their shots in 2016, but had the dual option of Canon FF and a smaller mirrorless body.
Maybe in Feb we not only hit the wetlands park, but a camera store or two