No Xfinity service if no power? Why?

In Michigan this past week, many people were/are without power due to the ice storm.  I was one of them, but I have a generator, so that was not a big issue.  But I was without Xfinity service despite having whole house electric.  I know there was no physical line damage, because power was restored for 2 minutes midway through the outage, and Xfinity service was suddenly available for that time.

This has been a problem only the last few years.  When I originally installed my generator, Xfinity service would continue to be available.  Not anymore!  Why would my service be linked to power availability when it wasn't in the past?  I suspect the answer is related to non-functional and un-maintained backup hardware.

Xfinity charges us all a ridiculous amount of money and promises great internet speeds.  This promise leads us to believe we can work from home, which I do.  But the speed is useless without reliability.  I understand that weather creates problems (at an increasing rate).  It doesn't change the frustration of being forced to take PTO due to a lack of internet (this time is very valuable to me!).

Xfinity, can you put some of that revenue into reliability in lieu of more speed?  Internet is quickly becoming a required resource just like water and electricity.