I disagree with the statement that "human race is slowing down". Probably certain species are slowing down, but not the race as a whole. In contrast to the '60 or '70s when only a few people could reach the highest speed, the humanity now prefers to make it affordable to everyone, and slowly goes toward this point. If we calculate the average speed people travel now all over the world - I'm pretty sure it'll turn out that it's a way faster than ever before. This explains why we prefer more efficient vehicles to a faster one: because we want to speedup ALL people, the WHOLE race.
So it's more like we have tried to reach certain limits by sacrificing lives of a few people, proved that we can survive that, and now we're ready to bring those technologies to the majority. There is nothing new with that - that's exactly how the humanity has been developing through it's entire history and I believe there will be new breakthroughs in the future.
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I disagree with the statement that "human race is slowing down". Probably certain species are slowing down, but not the race as a whole. In contrast to the '60 or '70s when only a few people could reach the highest speed, the humanity now prefers to make it affordable to everyone, and slowly goes toward this point. If we calculate the average speed people travel now all over the world - I'm pretty sure it'll turn out that it's a way faster than ever before. This explains why we prefer more efficient vehicles to a faster one: because we want to speedup ALL people, the WHOLE race. So it's more like we have tried to reach certain limits by sacrificing lives of a few people, proved that we can survive that, and now we're ready to bring those technologies to the majority. There is nothing new with that - that's exactly how the humanity has been developing through it's entire history and I believe there will be new breakthroughs in the future.