from a business point of view, Nikon's hybrids may have the best raw in the future, as Nikon acquired red with its decades of knowledge of one of the industry's best raw codec tuning under the hood. also, Nikon does not have pro video camera department for protection. however, from a historical point of view, although Nikon introduced the true DSLR revolution with its d90, earlier than 5d2, it is not willing to add more buffer to Nikon v2 and v3, convinces me that Nikon is still controlled tightly by Japanese industrial conglomerates. anyways, I still have high hopes on nikon, as its z mount is also the shortest flange distance.
sony, sigh, except its accidental error on fs700/r for excellent sdi out raw, its later low to mid tier cameras have crippled sci out raw to protect its high end Venice/2 cameras. on the other hand, Sony spent decades on codec implementation in hardware and firmware, its internal dsp is actually good enough. I will not bother with Sony's low end cameras' sdi out raw.
canon is similar to Sony, except there is pressure from the free open source magic lantern. so canon has to compete with magic lantern on feature providing. however, seems to me, canon is trying to use sensor as the differentiator, r5/r5c sensors are behind c70/c300 mk3, etc. I guess the logic behind is that even magic lantern can hack the latest canon mirrorless, it cannot do much with the lower quality sensors.
panasonic is the only one really aggressive, possibly due to its lacking of still photography camera department before. Panasonic seems also like canon, using sensor to differentiator its high end cinema cameras from its Lumix offerings.
olympus, its board controlled by Sony investors, is not willing to step on Sony's toes, even willing to go belly up. its ibis was supposed to be the most disreputable technology 10 years ago. yet it did nothing to exploit this.