At least a few people here have had the issue where their SB6141 sometimes becomes unresponsive during upload activity, requiring a reboot, and turning on QoS in the router seems to work around it.
Well, about a month ago, I replaced my ASUS RT-66U with a Ubiquiti EdgeRouter PoE + Unifi AP-AC-PRO access point. I decided to leave the QoS off just to see what happened. I haven't had a single freeze yet, and the modem is still running the same firmware it always was.
I'm not going to blame the router, at least not solely, since I believe that other people saw the problem with different routers, and it's been a year since I turned on QoS and eliminated the problem, so something else may have changed in that time, as well. But, this is an additional data point that may help someone somewhere, FWIW.
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