You can put a lot of satellites into the sky, but spectrum puts an upper limit onto bandwidth. Eventually you'll probably adapt directed motorized antennae, but those are way more complicated. Internet traffic is increasing dramatically around the globe, sooner or later we'll hit the limit. In the long term, only fiber can serve the bandwidth needs.
At most their aimed to maximize the amount of viable sky not individual satellites. It’s not going to scale to infinite satellites, but 10x their current target should be viable.
