Modern tactics are to use every radar around via datalink (AWACS, Ground Station, stealthy drones flying ahead). The onboard radar is last resort, but still very capable.
Useless tidbit about myself: Back in the mid-90s I was in the USAF in the 552nd Air Control Group, and the team I was on specifically did the 'external test' of the data link. Spent a lot of time in a simulator pushing buttons pretending to be an AWACS guy on a plane while recording all of the data, then later painstakingly comparing that data to the manual log and radio recordings.
I would be interested to see how far they've brought the technology in the intervening, uh ... 30 years. Damn. That old computer (old by technology, ours was pretty new in practical terms) was the only mainframe I've ever used. Booted it up by loading a tape reel and programming registers. I still remember that the 'happy' code was something like 0B00BE in between cycles, anything else and it had crashed.
The US is stuck with older F-16s than the current export models with advanced radar. They're gradually being upgraded with some Block 70 components. That requires the new cockpit so it isn't just a quick part substitution.
