Anyone using Xfinity and / or U-verse?

If I use U-verse, it is about 20Mbps (or 25Mbps?) and it is right below the Apple TV 4K streaming requirement. But Comcast, some 10 years ago, wasn't too reliable (it may have outage for 8 hours once in a while and they refund you $0.69 for it). So I am considering having both U-verse and Xfinity. Just so that Comcast is $50 for 400Mbps each month, and my backup connection will be U-verse (or the phone's 5G hotspot). Too bad I checked T-Mobile 5G cellular Internet is not available in my area. How is your experience with both? (while checking, I found more options, but unfortunately, they are not available in my area: T-Mobile Home 5G, Verizon Home 5G, Google Fiber, AT&T Fiber). TC 320k