I think with the variety of beam former and T/R ICs
coming out, there will be movement away from
modules to some plurality of panel designs (panel
will be driven by wavelength dependent element
spacing).
Of course my exposure in this area is all satellite
stuff and lower bands where element pitch is in
10+ cm range. Every one of the handful of systems
were made of custom MMICs and my own element
control chips, different for each customer / orbit /
frequency plan, and each one a one-off (no 400-
bird constellations here).