jweaver what’s bad for me is I only have 1200 (now 1300) and it struggles to even reach 1200.
I was havng issues with too hot a signal (which is why previously losing the XB8s channels sucks). Via the comcast/xfinity sub reddit, they confimed the issue and sent a tech. Fortunately, I got a good one and he added a splitter outside to tame the signal and then also replaced every single connector and also replaced the line connecting my jack to the modem. That seemed to do the trick, even if I can’t get the full speed that often, but I blame that on oversubscription of my node rather than wires that can’t handle it.
Perhaps reddit can help you too?