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 :
Xfinity XB6-T Cable Modem Wifi Router CGM4140COM For parts | eBay
How to Ensure Bandsteering is On for the Ignite WiFi Gateway Modem - Rogers
Just found out xfinity could upgrade your Modem for free. Thanks Xfinity for the Wi-Fi boost. Never had the XB7. Went from the XB6 to the XB8. With instant noticeable improvements. :