This also depends on the project being carried out as planned. Borconi-Szdressy is close to reaching its financing target and expects the first dongles to be sent in December for $ 55 each, but there is always the possibility of delays or other setbacks. You support the project in the hope of getting something back, not making a pre-order.
Still, this can make Android Auto significantly more convenient if you are willing to take a risk. You may not need to be so picky when shopping for a car or main unit. This can be useful if you are also using an older phone. AAWireless only needs a phone running Android 9 Pie, so this can help you delay a device upgrade if wireless Android Auto is important.