Upgraded” from the Broadcom XB6 to the XB7 w/Puma 7 chip and it's slower than the old XB6 even w/WiFi 6. The wall penetration is horrible w/XB7. Curious of other peoples' experiences :
Intel Pumageddon: Broadband chip bug haunts Chipzilla's past, present and future • The Register
英特尔Puma 6调制解调器芯片固件Bug迟迟未解决,面临集体诉讼-电子工程专辑
File:Intel Edison PCB Block Diagram.png - Wikipedia