Agreed. Owning the R makes you realize how stupid and compromising that huge mirrorbox space of a DSLR is. Take it from a long time FF DSLR snob. The massive mirror box/flange distance really makes it hard (and costly) to design a lens that performs. It also makes lenses unnecessarily HUGE. As the flange distance gets bigger, the lens gets exponentially larger.I'm an R user and see no reason to ever return to traditional dSLRs. My R is smaller, lighter, cheaper, and has as good or better IQ than the 5Div. Plus the AF is amazing, mounted to my Sigma 150-600mm is a dream come true! I think the RP will be a benchmark product, which is exactly what Canon wants it to be. A true gateway FF and mirrorless. I have no need for one but am glad its out there.