The end of life notification for these chips were issued in May of 2022, with final orders by December 2022 [1].
The chip itself from what I can see at a glance has unremarkable specs compared to newer ones (all of TI's offerings have better relative humidity accuracy), but of course needing to redo a PCB design and firmware is annoying.<p>[1] <a href="https://www.silabs.com/documents/public/pcns/2205311264-End-of-Life-for-selected-Si700xSi702x-RHT-Sensor-Devices-.pdf" rel="nofollow">https://www.silabs.com/documents/public/pcns/2205311264-End-...</a>
KTY84 temperature sensors come to my mind too.
But even software, look at the CR,LF thing. This is from before computers had screens and it's still kind of a thing / different between Linux, Mac and Windows (ok, 2026 most editors can handle it)
<a href="https://fiaos.substack.com/p/your-old-devices-depend-on-dying" rel="nofollow">https://fiaos.substack.com/p/your-old-devices-depend-on-dyin...</a>
<a href="https://www.quora.com/profile/Busy-Person-22/Your-Old-Devices-Depend-on-Dying-Sensors-The-Silicon-Labs-Incident-Proves-It-Read-this-paper-before-you-are-surprised" rel="nofollow">https://www.quora.com/profile/Busy-Person-22/Your-Old-Device...</a>