I prefer the full quote by Douglas Adams. I've come up with a set of rules that describe our reactions to technologies: 1. Anything that is in the world when you’re born is normal and ordinary and is just a natural part of the way the world works. 2. Anything that's invented between when you’re fifteen and thirty-five is new and exciting and revolutionary and you can probably get a career in it. 3. Anything invented…
3. is more like this: You've been through 2. so many times now that it is hard to get excited about new things anymore.
Enough time has passed that some of the things you've been excited for have failed or had negative consequences. You'll stick to the things that worked in 2. and are skeptical of things that have yet to prove themselves.
In your 3., things from 2. are accepted unconditionally despite failures, making 3. inherently irrational.