From the GitHub release page :

This is CircuitPython 11.0.0-alpha.2 , an alpha release for 11.0.0. Further features, changes, and bug fixes will be added before the final release of 11.0.0.

CircuitPython libraries from the 10.x bundles are still compatible with CircuitPython 11.0.0 builds.

Highlights of changes since 11.0.0-alpha.1

storage.map_file allows directly reading a file from mapped flash.

usb_host_audio.USBIn to support USB microphones.

RGBMatrix supports ABC row addressing.

USB Host Bulk IN support.

Many speedups, especially in displayio .

Many firmware size reductions.

Espressif ESP32-S31 support.

Zephyr additions: analogio , bitbangio , neopixel_write , pwmio , rtc , and watchdog .…