The up/downlink is the bottleneck if you want to provide backbone-like connectivity over satellites, and that's still done via radio. Those speeds may be great

The up/downlink is the bottleneck if you want to provide backbone-like connectivity over satellites, and that's still done via radio. Those speeds may be great for individual endusers, but if you're a datacenter which needs a lot of bandwidth then starlink would be limited by the shared radio bandwidth to the sats, which could be quite crowded in an urban environment, while fiber wouldn't be. That's why I only see them as competing on latency, not on bandwidth.