https://en.m.wikipedia.org/wiki/ACID
Atomicity (something happens in its entirety or not at all), consistency (database is always in a valid state — if the database has constraints, they will always be honored), isolation (transactions don’t step on each other), durability (complete transaction is complete even if there’s a power failure).
Not a database expert, my parenthetical explanations may need work.
I don’t know how to say this, but…you have extremely uncommon use-cases:
Many people listen to music on stereos and don’t necessarily want a device plugged in, so
either doesn’t work or is substantially less convenient than e.g. casting from a phone.
Not hating on your setup at all, but it’s very niche, in my experience.