Only to business/enterprise customers AFAIK. It’s actually rock solid in terms of reliability in my experience with a couple dozen customers in the Midwest. Even their residential coax connections are fiber-uplinked from the nearest switch, and are reasonably reliable.

Edit: None of which is to suggest that they aren’t still a shitty company in terms of their other business practices. They once included guest hotspots with every new business installation that used their customers’ power to sell more Spectrum services to anyone within WiFi range.