I'm in the progress of doing updates of my OpenWRT gear to 19.07.0. Just migrated my Netgear WNDR3700v2 to ath79 and it just worked fine.
I wanted to do the same for my Netgear WNDR4300v1, when I noticed that there are no images listed in releases/19.07.0/targets/ath79/nand/. The device page still lists an ar71xx image, while the ar71xx-ath79 dummy target page lists it as ath79 ready.
Can someone please shed some light on what's going on with ath79 NAND stuff? It seems a lot of images are missing. Are those NAND devices EOL'ed with 19.07 by having just ar71xx builds?