I have been using Linux from the days of Red Hat Linux 5.2 back in late 1998.
When I decided that, since I was always post-processing my photos to some degree (I hate slanting horizons!), I might as well start taking my photos in RAW format, I started to look for a RAW file processor that worked under Linux. I found a package called "Bibble Pro", bought a license and used it for many years. Bibble then sold out to Corel and "Bibble Pro" became "Corel AfterShot Pro".
I was using Olympus cameras at the time and discovered, quite by accident, that Olympus' own RAW converter was quite a bit better than AfterShot Pro's. Unfortunately, Olympus software does not run under Linux and there was no @##$ way that I was going to revert to Windoze. I therefore bought a 27" iMac and a 15" MacBook Pro with the Retina display, which I use when I am away from home. - I suppose it goes without saying that the Olympus software does run on a Mac. I also installed AfterShot Pro on my Macs as a backup.
When I decided that the time had come to "jump ship" from Olympus to Canon, I bought a copy of Lightroom 5 for my two Macs and have started using it.
This thread, however, has reminded me that I haven't yet compared AfterShot Pro's RAW file engine for Canon cameras with that of Lightroom 5. I'll play around with both of them during the course of the next couple of weeks and see what happens. - If AfterShot Pro proves to be comparable, then I may well resurrect my old Linux workstation from server duties and start using it for photo processing again. Not that I am thinking of ditching the Macs..... But it is nice to have a viable backup.
As for Linux, I am currently running "kubuntu" Linux as I like the "kde" desktop, which I have heard described as "the Windoze desktop as it should have been". I use Thunderbird as an email client and a mixture of Firefox and Google Chrome as browsers. Skype works on Linux. For office type applications, I use "LibreOffice", which also runs on my two Macs. Even though Linux is not particularly susceptible to virus attacks, I have installed "Clam Anti-Virus" to protect any Windoze machines with which I may come into contact.
The various distributions of Linux which I have used over the years have proven to be ultra-reliable and rock-solid. The only reason I relegated Linux to a support role was the lack of support for photo editing applications.
If Corel AfterShot Pro suits your needs, then go with Linux. You won't regret it.