Only dead in terms of availability. Once my SB Touch is gone, there's no available replacement.
Or are you meaning use the software only? Will Logitech continue to support it indefinitely?
I mean as long as you have LMS running on your network - now open source - then there are countless clients available that will work and are controllable just like an official SB.
Raspberry Pi with piCorePlayer with or without DAC HAT
Google Chromecast using a community plugin
Apple AirPlay device or speakers using a community plugin
Android Phone or Tablet using 3rd party emulators
iOS phone or pad using iPeng app
Upnp devices using community plugin
There are also new high end devices that are essentially SB Touch devices plus DAC in a fancy case.
SB isn't going away. In fact the RPi route has given it a whole new lease of life. The Pi plus piCorePlayer can be configured as a player only, a server only or a combined player and server.
There are plugins for a lot of streaming services including Spotify at 320kbps.
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