They are older compared to Grifo-E and our radars.
GaN have more error rate and needs more testing, thus that's why it took so long for us to do those radars, to make them safe
But GaN brings lots of advantages, allowing more power, less heat generation etc
I am now wondering how Akıncı is going to supply 20kW and 30kW power, F-16 for example produces around 60kW energy overall, F-35 produces 160kW (and iirc F-22 is 120kW)