Re: Failure version 2.10.6
Speaking as someone who's used GIMP for over 20 years, and Photoshop almost as long, I'll always turn to PS for photographic heavy lifting (though I've relied mostly on Lightroom for the past 10 years or so).
The biggest barrier for GIMP as regards photography for me was always lack of bit depth - GEGL simply stagnated for years. Anything other than extremely basic adjustments would quickly result in a histogram like a wide toothed comb. GEGL support seems to finally be getting there in recent versions, so I may need to check it out, though awkward raw workflows remain an obstacle.
Sadly, photography remains really the only reason I still have to keep Windoze around - wish it were otherwise (and yes, I've given most serious Linux only options a go over the years).