I would especially expect that a new user who couples his new flashed device for the first time with the Murena cloud doesn’t get a free space exhausted error message within hours because this mechanism pumps all the music files. This is indeed not needed at all and reputation damaging especially because it would be a very simple thing taking only a few minutes to fix these default settings: Synchronization OFF by default! What’s so difficult to let the user decide first what he wants? I mean before something definitely nobody wants does happen.
Nobody (!) needs music files in the cloud anymore. This has been an idea Apple had 15 years ago when they told the user he needs multiple different devices (iPhone, iPod, iPad) for different purposes and they needed a mechanism to synchronize them without thinking. But today this is not the reality, nobody uses an iPod anymore. The second fact is: the offered 1GB is much less most people have in their music library, so it nearly always (!) fails. A promising combination: nobody needs it and it always fails.
And what then? At first the user is frustrated about his new device, he must ask here what happened, he must stop this nonsense and he must clean up the mess. Even more: if he has still a data limitation (I had 500MB per month for years and never reached it until the first day on /e/) he has a good chance to achieve a violation. If he has roaming costs (like most Swiss providers still demand) and this synchronization starts for any reason in a foreign country this can get really expensive.