The first generation of GaA AESA radar wasn't actually that great. Look at the specifications for the Japanese F-2 fighter radar for example. This is why Russia didn't use GaA radar in the Su-35. They tried out first generation GaA radar technology and it was worse than the upgraded Irbis radar. Second generation GaA radar is way more capable and better than the technology in the Irbis radar, and GaN, which is third generation AESA radar is better still.
F-2 radar(at least, the first iteration) was a special level of horrible for a lot of money, but even a bit later, apart from
inherent AESA (ESA really) advantages, AN/APG-79 wasn't seen as especially more capable a2a set than AN/APG-73.
All things combined, fighter AESA truly becomes more and more decisive as it becomes more mature and multifunctional, i.e. from ~mid 2010s onwards.
There are, of course, very capable earlier sets (An/APG-77), but that came at a price.