Counterpoint to
@Babyrocko1908 (whose opinions IMHO are always well thought out):
I agree with the various assertions on this forum that SSP is a really accurate system - though I haven't formally tested, it certainly reminds me of a monitor speaker setup.
Surround sound perception depends where you sit in the car. From the driver's seat, I often subjectively prefer the Spotify version to the Atmos mix of the same song on Tidal. Plus there is not enough music in Atmos on Tidal that interests me, and it's annoying to actually find it in the in-car Tidal app. CarPlay apparently doesn't do Atmos.
Plus, the car makes various low-volume but noticeable high-pitched noises that make it more difficult to appreciate the fine points of a sound system. For example, each LCD generates an electrical hum; when they are in phase it's noticeable to me. Plus, the window switches emit a high-pitched electrical whine. And despite the Air's otherwise fantastic NVH, road noise will always interfere with your listening.
Finally, SSP needs a subwoofer, even though its bass extension objectively is fine. Subjectively, this would help both gangsta rap and classical music, both of which I genuinely enjoy and listen to regularly. I can see why there isn't one as many buyers of this car would prefer to have the space such a thing would take up.
All that said, my opinion is ultimately worthless because your ears are the only judge that matters.