My neighbor's R7900 has had multiple OEM firmware issues. Initially, it frequently dropped the WAN, now resolved with an OEM firmware update. The latest problem is it looses the router password with a power outage and needs to be reset. He is considering a new router as the warranty expired and Netgear hustled him for $89 "tech consult".
The device page has a warning on Broadcom wifi, (no 5g) but posts suggest that FullMac Broadcoms are functional. It also seems possible to remove firmware limits and make the device a R8000 w/ Kong, DD-WRT and Asus firmware. I suspect this could also be done with OpenWrt R8000 build but a websearch did not find anyone who attempted this.