The hardware on the soundtouch 10/20/30 series was always surprisingly over engineered with heavy magnets, decent power supplies, and good enclosures but let down by a sluggish app and flaky mDNS implementation.

With this, they just became the best value proposition on the used market. Flashing these with a minimal distro running snapclient (for multiroom audio) and shairport-sync (AirPlay 2) makes them infinitely better than they were on stock firmware. eBay prices are probably going to double by tomorrow morning.

I have used a ST10 as my tv speaker for years and despite being mono it has such a clear and full sound. Spectacular little box.

Except they didn't open source anything. They just published a simple API spec to allow play/pause/next button support over http.