The A7Riii (& A7) is my go to for sunrise/sunset/dedicated landscapes/night skies/etc etc No doubt about that.
I need to not compare the Sony vs Fuji IQ - which I don't really do in all honesty.
I accept that the X100f IQ is going to be lower but it's not too much of an issue right now. I use the Fuji for dog walks, daytime beach walks, street photos, when we go for a drive anywhere.... I don't know how big my 'little' messenger bag is, but it'll fit the X100f, Yashica film camera, batteries, drink, sunglasses and you don't even know you are carry it. It is nice. Also, going out with the drone & X100f is also a tiny messenger bag.
I haven't had any AF issues as of yet with it. The Vi obviously has the better lens, more megapixels!, flip screen, quicker AF - I think that's probably it, off the top of my head, that appeals.... But would I rather walk around the streets with an X100f that cost me £700 or an X100Vi that cost me £1600...??