This is strictly not true, I have 2 further Home Minis that are out of
warranty, and they continue to work, whereas the third one is bricked.
It may have been an update that caused it, but it's not solely due to
them being out of warranty.
See also:
https://www.googlenestcommunity.com/t5/Speakers-and-Displays/HOME-mini-UNRESPONSIVE-thread-quot-Google-home-mini-4-dots-stuck-problem/m-p/563073/emcs_t/S2h8ZW1haWx8dG9waWNfc3Vic2NyaXB0aW9ufExRN0NJREtIS00zTEFHfDU2MzA3M3xTVUJTQ1JJUFRJT05TfGhL...
