True, for now. I have to wonder whether lens design has reached its theoretical limits. Maybe one of the lens manufacturers will create a radical new design that comprises light weight, constant wide T-stop, long focal range, and relatively small form factor.
It is simply not physically possible. Large sensors require large lens elements and large physical apertures to deliver light at the same average exposure density. It comes down to basic inverse square law physics. Double the sensor area and you have to deliver four times the light for the same f stop.