I'm mostly just recreating my existing Watch app with the new sync codebase and modern watchOS APIs, rather than making major changes or adding new features (for now, at least).

This has required literally a complete rewrite of the Watch app.

The result is MUCH faster and more reliable in every way, which dramatically improves launch speed, syncing, playback, and phone control.

And it prevents sync bugs on your iPhone (playlist ordering!) from the old Watch app syncing with the old protocol.