The reclined seat has not been tried by anyone else since the F-16. That may tell you something, or it may not.
It tells me that no other fighter has been designed with a cockpit as small as the F-16s. My understanding is that the reclining seat was more about fitting it into the limited cockpit space than with increased g-tolerances for the pilot (something of a marketing gimmick).
Maybe the Iranians might choose to adopt it for their new 'stealth' fighter...
