This could not be more true. When was the last time you referred to a teapot or a bicycle as "technology"? Even Google wouldn't be called "technology" anymore by most people who use it -- it's just Google, and it just works.
Adams didn't say that. He was quoting computer scientist Bran Ferren in his (Adams's) article in The Sunday Times "How to Stop Worrying and Learn to Love the Internet". It's reproduced on his personal website here: http://www.douglasadams.com/dna/19990901-00-a.html
The actual quote is slightly different: "Technology [...] is stuff that doesn't work yet."
Salmon of Doubt
He could not self-manage his work once he had wealth and had no need to write for living. Once his editor rented cheap hotel room, removed all distractions and hovered over him until the book was done. Adams worked with Salmon of Doubt 10 years and didn't even manage the first draft.
[1]: https://en.wikipedia.org/wiki/Huntsham_Court#Notable_guests
And I heard someone talking about teapot technology just last week, but he was (a) British and (b) a master electrician, so he had especially strong feelings on the matter. :-)
I don't often hear technology used as a noun (except in sci-fi stories, where it's a MacGuffin). It's an adjective: the level of technology of an item. This e-bike has improved technology compared to last year's model.
This is the same way we used it when I was studying archaeology in school. What's the level of pottery technology of this civilization? The pots clearly worked, just like a rotary-dial phone worked. They just weren't as advanced as others.
'Technology' is used as a noun in both of those sentences.