If you don't mind the AF speed, the slow frame rate, weight, bulk, etc, etc. Its a lovely system, though I am quite often reaching for the X100F for just going out. If I've got a purpose in mind, then its the GFX.
I've been so impressed with the GFX, that I've actually sold most of my film gear, and all my interchangeable X series stuff. I don't actually miss any of it, and I'm not craving any more GF lenses, what I have suits my photography, So I think in the long run it might actually save me money, except I'm now spending it on places to go to shoot, but maybe thats a good thing!