Already had one for a couple of hours, have been offered another one for a few days, its the overall cost of 'upgrade' that's the killer, a GFX50S and a couple of lenses is the best part of £10K and even with the discounts/cashback/trade in, its still a big wedge of money. Its also quite heavy and one of the reasons I started with an X100 was weight!!! I also can't trade in all my X glass as my wife has earmarked some of it!!!!!
(and my 6 year old car has just passed 173K miles, it can't go on forever, and I know it can't take pictures, but without a car I can't earn very much money as a lot of my work is site based
and I know that if I buy an expensive camera, my luck says my car will pack up!!!)