I’ve noticed the same indeed. The buildings are not showing as much ‘window’ lighting as pre-alpha.
Amazingly I’ve just realized I’ve left FS2020 running in the background at the very same spot all paused, so now it is the night in the simulator and I’ve posted a new screenshot (with the weather panel showing time of day).
I find update #5 lighting in SFO is not too bad though in the distance. It clearly shows the NASA Black Marble texture further away than #4 as promised (can be seen better in the night shot), and the overall “density” of lights are quite realistic around KOAK and northerly from there.
However up close, in the SFO city, it looks like OSM synthetic streets painted with a repetitive pattern of poles, with the main road to the bridge highly lit and all others almost not. Furthermore, pre-release is showing much present building window lights than update #5 and this makes it as-if there is a power outage in the city as a whole!