Compute becomes cheaper and larger undertakings happen. LLMs are huge, but there is new tech moving things along. The key part in LLMs, the transformer is getting new competition that may surpass it, both for LLMs and other machine learning uses.
Otherwise, cheaper GPUs for us gamers would be great.
Skimmed comments, but if you download and manage your music on your own on a machine you can have a super simple setup like I do. All music is synced using Syncthing to my phone. So my phone gets local storage, and then I use Poweramp (android) to play it.
I pretty much have a folder for all the music though. But I assume you can sort music into folders to have them as playlists. But perhaps not as practical as desired.