They did release a new community phone too - C2. Nothing spectacular in terms of specs but still.

Travel time is just distance/speed

And that makes the function like ’y = 1/x’ which is not a linear function. No dark magic, just math. The gist is the proportial part, not just inversely.

It is not linear but some sort of hyberpolic function as the OP is describing: double the speed and you halve the travel time, you move closer to zero travel time but never reach it. With a linear relation you would reach zero travel time at a specific speed point.