i’ve not yet seen a sound sample above a few 100mb, uncompressed. however it’s quite common to see a source model, or even a cooked down version, can absolutely be above 1gb. sound, except soundtracks (mostly), are also reused whereas models are not usually. couple that with one of your reasons, supporting all possible resolutions (PC games are the big offender here), and i don’t see sound being a huge issue. you can also compress sound while in transit, textures will only compress so much. wavs/PCM compress quite well