Wifi

• n vs ac speed

Laptop form factors

• mini PCIe
• m2

Open source wifi drivers/devices

• Purism Decides on Wireless Qualcomm Atheros 802.11n over 802.11ac
  • librem-14 2021 still ships with Atheros 802.11n device
• Comparison of open-source wireless drivers
• wireless kernel wiki drivers page
• FSF RYF wireless devices

Atheros

• Wikipedia: Atheros

802.11ac support

Seems there are still no ac/ax devices with pure open source drivers which doesn't need propriatary firmware.

ath10x kernel driver and supported devices