Bill Pierce
Well-known
For raw conversion I use only the camera maker's raw converter. Nobody else knows the sensor inside and out, and nobody else is as motivated to get it right. Less casts that way.
I use 3 brands of digital camera and 2 scanners with b&W and color negative film and a variety of transparency films (the film is from the past, but it's important to me). It's a lot easier for me to use programs that really don't care what the source of my images are. For me, the cameras are just tools. Consequently, my camera bag is often a mixed bag. And the software has to handle that mixed bag.
True that it costs less to use the software furnished free by the camera manufacturer, but over the years I think the independent folks like Adobe, Capture One and DxO have come up with programs that do exceptionally well with raw files. Leitz has no processor of their own, relying first on Capture One and then Adobe. To be honest, I prefer the same independent software for my Canon files. I started with the Canon programs and have evaluated their software every time a new camera purchase has given me an upgraded copy of the software. I think the Canon software is very good. The independent software has more features, but long before we get to those bells and whistles I find the independent programs often produce results more to my taste. (For example, the preset sharpening for the small sensor Canon S90 and G10 in Capture One is more to my taste than the Canon program.) Notice I say "taste." I don't argue with someone who prefers another result or who doesn't want to use the added features or the universality of the independent programs. But in no way has my experience led me to believe that the major independent processing programs are in anyway inferior to those provided by the manufacturer.
My experience, obviously limited, has led me to a conclusion that defies logic. The independent programs produce superior results to the manufacturer's software.