This is a valid question! Adobe rules on Windows because it uses all the features Windows has to offer for a smooth experience, but it is waaaaaaaaaaaaay too old for linux. Darktable for linux for instance, uses OpenCL acceleration, Lightroom doesn't. GIMP and even fucking LibreOffice use OpenCL acceleration, Photoshop doesn't except for some plug-ins. Premiere uses CUDA/OpenCL acceleration, but it deteriorates the rendering quality, that would not be acceptible in Linux. CPU rendering is more efficient in linux, Premiere can's leverage that extra performance... same with flash, which is just a hazard to use.
Adobe just had a patch day... no patch for linux. Adove is now focusing on a better implementation of DRM to lock down their delivery software even further... linux is not concerned, they use the PDF standard, but without the DRM... Adobe can't win on linux, that's why they do everything they can to not even have to try. The fact is that community open source software has evolved to a point where the software industry can't afford to produce the same quality any more. They just don't have the money to spend on the same means of production. And they bloody well know it! That's why they keep trying to boycott linux in every way they can, especially by crap marketing and by blocking hardware platforms (drivers). They tried in the past with software platforms, they won't make it, and they bloody know that very well also.
Why is it so difficult to get open source software for the creative industry on linux? Very easy, because there are many blocking points: media formats, codecs, GPU drivers, etc... and they are all exploited by the industry: when open source media formats come out, hardware manufacturers take money from software companies to block them, or why do you think only Leica and Hasselblad use open source RAW standards? It's an industry based on closed standards and cuttroath marketing, and that whole industry clings on by the tip of their nails, with a gaping abyss beneath them. FFmpeg slipped up for proprietary music codecs, and a part of the industry crumbled into nothingness. As soon as there is the slightest slip-up, the entire industry will fall, and it will happen sooner or later. Nikon and Canon wanted to use linux in their products, and they had to document their camera RAW standards. A few months later, their own PC software imploded. Sony still hangs on to proprietary video standards, limiting what a user can do with the video files on closed platforms, but not on open source platforms. AMD wanted to leverage the HSA potential of linux... they're now prioritizing open source drivers, just like Intel. nVidia wants to play on the ARM-market... they're merging all of their Tegra-instructions in the open source linux kernel... and there will come a time where they won't be able to provide all the services they want to provide, like the intercompatibility between their Tegra devices and their PC-hardware, without open sourcing their crap, and if they don't, they die, and that can happen quickly, as AMD has demonstrated. Open source has become a weapon that closed source dependent manufacturers use against each other to compete each other to death. The power of open source is much greater than it is given credit for, and open source will prevail.
Autodesk was waaaaaay more intelligent about this whole evolution than Adobe. But hey, maybe Sony will want to buy Adobe for cheap, I think they might be interested in the long run.