Never had a vent window leak. Maybe a bit of wind whistle.
The reason the vent window went away is because A/C became the standard. No need to open windows to bring in the added ventilation the vent windows supplied, when instead the driver would just crank the A/C.
And eliminating them reduced the build cost.
I still have a truck with vent windows. Leaking is such a known issue with them that there are adjustment procedures in the manual.