Successful XB7 Gateway Use

I would like to hear from users successfully using Xfinity's XB7 CGM4331COM (Technicolor) modem Gateway.

My current, internet & hardware:

Xfinity 1GB internet service, which now supports up to 1.2GB, through XB6 (Technicolor), provisioning my LAN & WiFi and reliably getting 900+ Mbps downloads (at the XB6) on my ethernet LAN; reliably using 2.4 & 5 GHz WiFi. {I do not speed-test my WiFi, but all WiFi devices show full strength as I move around my 1300sf 2-floor condo.}

Network provisions  devices: iMac i7 27 (macOS 11.4) on ethernet LAN (& secondarily, 2.4 WiFi for Maps & FindMy); TV 4K (1st gen.) connected to LAN (but does use 2.4WiFi for AirPlay), as well as HDMI connected to an audio-video Receiver & 4K Widescreen; with exception of an iPadPro (3d gen.) being on 5GHz WiFi, all other WiFi devices on 2.4WiFi.

Considering making these hardware changes:

XB7 Gateway, connecting a TP-Link Multi-GB 8-port (Port 8 is a WAN) Switch (no router function) for adding LAN devices. Device connections will stay as detailed above (Network SSIDs & passwords remaining same for easy migration). ...Also, considering upgrading Ethernet Cables (currently, Cat6) to Cat8; but, no issues with current, Cat6 cables.

I do use Xfinity's iOS Xfinity app (v3.34.0) and find it a bit more robust for certain setting views or changes, as compared to direct browser login (@ 10.0.0.1); although some modem changes (such as passwords, particularly when I change the default, Gateway password) more easily done using browser access.

My XB6 does not implement: port forwarding, custom DNS servers, DMZ, hotspot, tile devices. (XB7 would remain same.)

Given my objective(s), what are particular settings on your XB7 you feel achieved a stable & optimal setup? (If you transitioned from an XB6, did you simply setup the XB7 with same settings?)

Correct me, if I'm wrong, but I've read the XB6 has 8 WiFi antennas and the XB7 has 4. ...Any thoughts about the difference and impact?

Did your setup necessitate completing a subsequent, firmware update?

Thank you, and I look forward to reading replies.