ATT put fiber in my back yard a few years ago. Internet has been very stable. Had a couple of short late-night outages that I think were maintenance. I run a late schedule. If I’d been working “normal” hours I might not have seen it.
Unlike my Spectrum/Charter experience, upload and download speeds are blazing fast. Seeing email and talking to neighbors, cable in general can still be problematic and customer service isn’t great (which is why I dropped Spectrum completely).
Have had good luck with cell hotspots when I’ve needed them (ATT). But I live in a metro area with good coverage.