Summary
Purism's upcoming Librem 14 laptop has a physical microphone/webcam kill switch. That kill switch will now also cut the microphone input from the headphone jack.
Quotes
My thoughts
I don't trust makers of laptops from a security standpoint. On top of all the things Purism does to their laptops (use coreboot since 2016, free software only Linux based OS, boot tampering detection), they include physical kill switches that cut the power so you KNOW the webcam or WiFi off. Since this laptop will use a current Intel CPU, unlike their previous models, I am super excited about it! With Anthony having just unboxed that s76 laptop, thought this deserved some mention as well.
Sources
https://puri.sm/posts/librem-14-adds-microphone-kill-switch-enhancements/