A few years ago, I augmented my system (Nikon D810) with a Fuji X-T1. Since then I’ve upgraded to the X-T2. Both cameras are excellent, though the X-T2 is unquestionably an improvement over its predecessor. The Fujinon lenses, particularly the primes, are really quite good, both optically and in their build quality. Though my Fuji kit won’t be replacing the Nikon anytime soon, as a walk-around solution or if circumstances prevent me from taking the much heavier and bulkier Nikon system, the Fuji is a viable compromise which has never disappointed me. Regarding post-processing, the X-Trans sensor does create some workflow problems. I’ve been a Lightroom user since Version 1. Unfortunately, Adobe demosaicing of X-Trans files leaves much to be desired. Granted, it has gotten better, however I personally am still not really happy with the results. For me, Iridient Developer (for Mac) produces the best results. Because of that, I usually first import the RAF files into Iridient Developer (from LR) and have ID do the demosaicing, produce a 16-Bit TIFF, and export it back into Lightroom. Not exactly ideal, but doable and I find the results noticeably better than when I rely solely on Lightroom. Regarding IBIS, as a landscape photographer, most of my work is done on a tripod so it really isn’t an issue for me. Having said that, the question of whether IBIS might be implemented in a future Fuji camera is a topic often discussed on Fuji forums. Fujifilm is a company which generally listens to the wishes of their customers. Perhaps it’s only a question of time. Best of luck with your decision!
Larry