Google ends support for first-gen Chromecast, upgrade required.

TL;DR
Google has ended support for its first-generation Chromecast dongle, meaning it will no longer receive software or security updates, nor will Google provide technical support. Users may notice a degradation in performance over time. Google has a recycling program for unwanted hardware, and users are encouraged to recycle their old Chromecast instead of throwing it away. Those who still want a Chromecast can purchase the third generation Chromecast or the Chromecast with Google TV.
- First-gen Chromecast owners will need to upgrade after Google terminates support TechRadar
- Google warns popular TV gadget will stop working – affected users must upgrade now... The US Sun
- Google ends support for the original Chromecast Digital Trends
- The Original Google Chromecast Won’t Get Any More Updates How-To Geek
- Google Stops Updating First-Gen Chromecast After 10 Years ExtremeTech
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