How's the HUMAX working out for you? I was considering it too.

but I saw it's not actually on the list of devices at https://www.xfinity.com/support/devices/ . It seems like a number of DOCSIS 3.1 modems that definitely work with Xfinity are not listed for whatever reason, like the MB8600.

I saw some people suggest it might be because they're no longer recommending ones that don't have a 2.5 Gbps ethernet port, but they do recommend this other cheaper one, the $100 Hitron CODA56, which is also 1 Gbps ethernet only.

Anyway, what's the admin page like on the HUMAX? Does it have diagnostici info like a list of channels locked, signal levels, etc? What about the ability to reboot the modem from the admin page?

I've used the diagnostic stats on my old TP-Link TC7610 to help figure out intermittent issues in the past, such as one channel being locked weakly and repeatedly losing sync.

The Hitron: https://www.amazon.com/Hitron-Approved-Comcast-Spectrum-Ethernet/dp/B0981553MT/