I've abandoned Windows many, many years ago (late nineties) and have watched Linux progress both as an OS as well as an excellent ecosystem for very capable software, software which often outstripped the capabilities of commercial offerings on OSX or WinX.
Many years ago I built and released the "PCLinuxOS Digital Photography Edition" (or DPE for short) - a remastered PCLOS installable LiveCD - which brought together a stable OS suitable for both beginners as well as advanced users and all of the photography tools, scripts and profiles available from any number of sources. I even got permission from the original author of RawTherapee himself to include it on the CD even though he had not yet decided to open-source this awesome piece of software at that time.
A lot has happened since and generic and advanced photography tools have come to mainstream Linux distros such as Ubuntu, Mint and Arch. The distros themselves have become smoother to install and easy to maintain, accessible to anyone willing to make the mindswitch from Windows. I now see a wonderful development with many of the Linux-only software packages making an appearance as true cross-system capable packages, available to Apple and/or Windows users. Eventually this will benefit everyone even though I am still seeing the benefit of running Linux - software such as Gimp, Rawtherapee, Digikam, Darktable etc. just runs smoother, faster and glitch-free on Linux.
Given time, even that last distinction will disappear and people will benefit from access to open-source digital photography apps on any platform - just perfect!
As to the history of the PclinuxOS DPE, have a read here:
PCLinuxOS Magazine - HTML