The Bluetooth Proxy has also had a whole lot of work done by @bdraco under the hood to improve the stability, speed and reliability between Home Assistant and the bluetooth devices that get proxied through. Along with some of these bluetooth changes is a change to the underlying flash partition table that ESPHome uses. OTA will work, but to fully take advantage of the performance increases for bluetooth, it is best to at least one serial flash with ESPHome 2022.12.0 or later.