I'm one of the ones in the 10 day reset camp. been this way for a while but nothing suspicious going on (line noise , margins all good, etc.). i keep checking around the 10 day mark hoping to get to 11 (i know, how sad), but that never happens. it does reconnect around the same stats, except last time i noticed the downstream sync status had dropped a tad to 19.99 from 20 solid so i'm keeping a watchful eye to make sure it doesn't continue to whittle down. @imjolly gave me advice that its an inconvenience of the bt hubs more than anything else and as it comes back on in or around the same speed, then ignore it or look at 3rd party router.
currently at the below after latest reboot/reconnect.