RE:FAA proposes requiring 5G safeguards on planes by early 2024This seems to confirm that 5G is coming to aviation, like it or not. The Edge also supports 2G/3G/4G in the meantime. Wouldn't make sense that anyone buying new tech would buy something with a ceiling of 4G.
I would think that, for purposes of the WQAR, use of 5G would be unaffected since the transfer is typically made while the airplane is on the ground.
From the
Teledyne WQAR manual...
"WQAROperationOverview.
The primary purpose of the WQAR is to record and store flight data provided to it by a data acquisition unit such as a DFDAU or FDIMU. Then, while the aircraft is on the ground, it wirelessly transmits that data to a base station using high-speed 3G/4G-like cellular technology (where available). If unable to transmit, a backup encrypted copy of your data is stored on the removable Compact Flash (CF) card."