While the 5D is built like a tank and the r6 is a bit more plasticky, i don't think it's a big issue at all. You take photos with it and (hopefully) don't knock it over someone's head. The 5D has a bit more resolution, but a stronger antialias filter, so sharpness-wise, they are really comparable. other than that, the r6m2 is clearly the superior camera: No need to micro adjust fast primes because of the missing mirror assembly Fast eye tracking autofocus great movie capabilities higher speed bursts and pre-burst capabilities EDIT: Better high iso performance I don't know where you got the idea, that the 5D supports more lenses, but the opposite is true: almost all EF lenses can be adapted to the R6 and work flawlessly. Even better than on a DSLR most of the time, since front- and backfocus isn't an issue anymore. Plus you can use the new RF lenses, most of which don't have an equal on EF mount. And for the price point on the rf lenses: simply adapt old ef glas for starters. I got some kick-ass EF primes for really cheap, since everyone is migrating to the RF lenses. and the only gripe with thirdparty lenses (af accuracy) is simply gone. The only downside is the added length because of the adapter, but that's not an issue for me personally. More on reddit.com

I've got some news for you about the rumor sites and how they make their money... More on reddit.com

I'd wait for the Mark IV! :-) More on reddit.com

The R6 OG is still relevant. The Original EOS R is still relevant. dSLR's are still relevant and are used by millions of professionals worldwide every day. More on reddit.com