The sensor in the S renders very nicely, but the AF is very pedestrian (by current standards), so zone fiocussing will be the way to go for street work.
The lens is quite soft at F2 when used close up - it certainly sharpens up as you stop it down. The F used some softwrae tricks to gte it sharper at F2 and the V/VI are a different lens.
I prefer the rendering of the earlier X series sensors and it is certainly accepted as being less digital (and yes we can argue about that!) - I have an original X100 and an X-Pro1 - and I feel that from X-Trans III teh sensors certainly 'lost' something, tahts not saying they are bad cameras but the images loose some of their charm.
It's been a while since I had my X100S, but I'm more than happy with the photos I've gotten from it. It still has a lot of the core features of the newer X100 cameras and handles pretty much the same, but won't be as performant. IMO, worth getting if you're set on an X100.
Thanks for the replies, it's giving me plenty to consider.
Regarding the Auto-focus, I have an X-T20 which although not upto DSLR standards, the AF is plenty fast enough for me, I also have an X-T100 that I brought because it was a good price, but the AF is awful, and general performance is awful, which would the AF on the X100s be more comparable to?