Regarding KSFO.
The thresholds for 28L/R have been displaced very recently by ~300ft. Furthermore, new glideslopes have been installed/are in the process of being installed.
Aircraft are usually cleared for a visual to 28L/R on a CAVOK day like today.
If the had the ILS for 28L showing, TCH would have been 64ft.
Note VGSI and ILS glidepath are not coincident