An AP vendor being considered for a WLAN deployment suggests that their 2.

Software-defined radios (SDRs) offer flexibility in RF operation. In dual-band APs, an SDR can be programmed to operate on either 2.4 GHz or 5 GHz, allowing dynamic optimization of the spectrum based on demand and interference.

From CWDP-305:

“Software-defined radios can be configured to operate in either band, allowing administrators to shift coverage based on band congestion or capacity requirements.”

This flexibility helps address issues in high-density deployments or when minimizing interference is critical.

— Reference: CWDP-305 Official Study and Reference Guide, Chapter on Infrastructure Design