I don't use the most popular photo editing and negative conversion software, so take my recommendations with a grain of salt.
I don't understand why any photo editing software would not have negative conversion built-in. Building that function out to a separate application just makes no sense to me from a user's standpoint. It might make sense from a business standpoint to market another application, but that's another discussion altogether.
the DT approach uses a single software app to address these problems in stages, the first step being to do the automatic negative conversion. The Negadoctor module does a very good job in performing conversions for emulsions that range from very light to very dark. Then, I use the white balance module as a separate step when white balance corrections are necessary. To me, it makes sense to isolate these processes into separate steps so that you're not trying to accomplish too much in a single step, as doing that can make things very complicated.
the DT platform is quite powerful. Some people claim that it's more powerful than Adobe, because Adobe is intended to be more user friendly, but I can't speak to that. What I can tell you though, is that while the negative conversion is easy, DT has many modules that aren't what I would call intuitive, so it involves involves a steep learning curve. I don't consider myself a PP expert by any stretch of the imagination, but I've always been able to accomplish what I need to accomplish. I'm still learning so it takes me a long time to get things done. That's one of the main reasons that I hate PP.