ja. 2 weeks ago our companie's new Xfinity biz internet service went down from sun 11:45p until my partner showed up at 6:am Monday and had to cycle the power to the cable modems to bring it back up. That of course took my main farm @239TH offline...
Today thanks to the lovely ice storm we had Sunday morning there are still tree limbs coming down... You guessed it. Lost internet at my house for 6 hours dropping 78THs. At my GF's house where 2x 741's reside the 'net has been out for the past 20hrs....
Damn that really spoils the look of my shift graph...

...and that is why I have a backup connection from AT&T wireless. Comcast Business works most of the time, but it is cable service. So it fails from time to time. When it works, it is great. But it takes a while for them to roll a truck. Cell service is much more reliable, but not particularly high performance.
Fortunately you don't need a high-speed connection for miners. Most home cable speeds are "overkill" for moderate-sized mining farms.