If I'm understanding the fleet site and the OMAAT article correctly (assuming that Gogo 2Ku is considered Intelsat and that the AA Fleet Site is up to date), this is what the fleet breakdown will look like for free Wi-Fi:

Aircraft with free Wi-Fi:
All mainline narrowbody aircraft (including 32Ts and XLRs)
All 787-8 with Super Diamond biz seats
All 787-9P (new high-J config)
Some of the CR7s and CR9s (ones with Viasat, no way to tell from looking at fleet type or seat map)
Some of the ERJ-170s and 175s (ones with Viasat, no way to tell from looking at fleet type or seat map)

Aircraft with free Wi-Fi announced:
Refurbed 77Ws (ones without F, aircraft with F have paid Panasonic Wi-Fi)
Remaining CR7 and CR9 that still have Gogo Air-To-Ground (the free option only covers satellite wifi, these aircraft should be getting Viasat in the coming months)
Remaining ERJ-170 and 175s that still have Gogo Air-To-Ground (the free option only covers satellite wifi, these aircraft should be getting Viasat in the coming months)
777-200s (converting to Viasat starting Fall 2026)

Aircraft with paid Wi-Fi for the foreseeable future:
All 787-8 with Concept D biz seats
All 787-9 with Super Diamond J seats (30J)

Aircraft with no Wi-Fi and installation not planned:
ERJ145s