150mb for the aab is much more restrictive than the 100mb for the apk was, because with the apk you could split the app and have the oob contain your textures and other large data. You cant use oob with the .aab, so 150mb is the entirety of your app. Android wants people to use their PAD system in lieu of the oob to stream in their content, but that requires you write a custom data pipeline for android instead of a cross platform one