u/safranek86

I found this in 8.13.x.x release notes:

In AOS-8.13.3.0, AP‑7xx access points support migration from AOS-10.x to AOS-8.x using the Dual Image feature. APs boot into AOS-10.x by default and may automatically detect AOS-8.x based environments (IAP Swarm with Virtual Controller/Classic CoP or a Mobility Controller). If a controller is discovered and no Cloud or IAP environment is detected, the AP automatically converts to an AOS-8.x CAP.

BTW, 8.13.3.0 is not released yet, but maybe will be in a couple of weeks.