ESP32 can stream I/Q up to 80MSPS 10bit from 2GHz/5GHz by tapping Wifi/BT stage (github.com)

Guess we have a new 'rtlsdr' for the higher frequencies!

Great thing on top: as the entire ESP32 is WiFi/BT-certified we can expect a very solid radio quality.

> turn supported chips into low-cost software-defined radio receivers for the 2.4 GHz band