After a couple of years I am still comfortable with my X100S .. for me it is a 'go anywhere' system with real professional capabilities. One feature sorely missed however is an on-lens DOF scale; that is really critical for street work.
I would guess that low cloud is acceptable as fog ..... this was a nasty day with drizzle in the wind.
Used darktable to process this in a pseudo IR style. Been using darktable for many years ... only way to go!
ISO 200 using a X100S