I'm just curious. Why are you selling your camera and lenses?
That's a very good and fair question. To go to something that I think suits my individual needs better. The R is leagues ahead of my now sold 5D Mark III in my opinion, so is the AF and focus points of the R... along with real nice eye AF, which is very important to my work. It can really do wonders for composition. I loved my old gear, no doubt. But the R and RF system is better for me. It may not be for others, but for my needs it is. I vacillated between choosing the 5D Mark IV and the R. The R won for my needs and cost far less for the body. I am also on a very low income. Very low. I am disabled and live on my life savings. So I really have to pinch pennies and eat very cheap. I wear cheap clothes until they have holes in them, including $10 tennis shoes from Walmart. I live in a tiny one bedroom apartment of 547 sq ft. Photography is my only hobby, and only luxury. One day, when I improve enough, maybe I can start charging more often and up my income. I'm trying real hard, but have very little idea how to do that. My cognitive problems don't help.
I honestly didn't think the difference would be so big and I actually bought the R as a backup camera. After shooting with it, I find I really like the files and versatility. So, in the future, I can see myself getting another R as a backup. I think having two cameras of the same model will help me in fast paced situations I run into at model boot camps. I can have two of the same camera mounted with two different lenses and not have to remember two different methods of operation or worry about dropping things when I get flustered changing lenses. A huge advantage for a guy that has a lot of trouble remembering and learning new things.
The selling is to finance the new system (partially finance). My hit rate (eye) with the RF 24-105 f/4 is astounding. I'm making an educated guess, I think, that the f/1.2 and f/2 RF lenses combined with the R are also far superior. I also lust for the 28-70 f/2, just like I will (I hope) a longer f/2 zoom in the future. Also, sometimes I need to make some fairly large crops to capture an interesting part of a photo I see in the whole photo that I didn't see when taking the photo. The extra mega pixels help with that for me. When I print, they are almost always 20x30. The 5D Mark III handled that. The R will handle larger sizes better after a crop.
So my reasons are all personal., which is what choice is about. I won't ever knock anyone who chooses differently. We all have different wants/needs. I would prefer the R have IBIS because the lenses I will be choosing don't have IS. I'll look long and hard at an R body with IBIS and dual card slots in the future because of my experience with IBIS via my little Olympus. Yes, those fast RF lenses vignette. However, for what I do (portraits and fashion) it is not a problem, and my usual individual style is to add it anyway... sometimes heavily. I personally like vignette in most of my photos.
I hope that answers your question, and thanks for asking.
BTW: The fully articulating touch screen was also a big factor. I hope the pro version has it. It will take me years to round out my kit again, but that is half the fun. The RF 85mm f/1.2 is next on my list and I should have it soon... thanks to selling my EF gear, which I bought when I was in far better financial straights. I also have over 40 M42 screw mount lenses. The focus peaking helps my old eyes there too.
Example of where I think vignette improved a photo I took. The photo is cropped, so the vignette is right where I want it... mostly in the lower right, lower left, and top right. Crop came down from the top left, so no vignette there. I didn't want it in the top right and thought of that when I composed the photo and thought about how I would end up processing it in Lightroom/ Photoshop. Just my personal taste. I know vignette is a problem for many others. For me it is an advantage. 5D Mark III, EF 70-200mm f/2.8L IS II, no flash.