I'm pretty sure this is the case. I think that the ideas are great in producing a vocabulary for classes of structures within software architecture the way people creating a car can talk about gears, rotors, pistons, gaskets.
Whether or not you have the right rotor/gears/gasket/piston is up to the specific case. And sure some of those things may become like carburetors, and may become largely obsolete. But there is definitely a value in having a consistent vocabulary for things like "That box that controls the air-fuel-ratio mixture before it goes into the cylinder."
The concept of design patterns is highly useful. The particular patterns in one book would always be of limited usefulness. Often times devs are more eager to prove their smarts than to get a job done well.
That's such a good quote, I just may copy + paste it mindlessly into my next presentation and assert it with zeal. (With credit of course)
My position is many ideas are still valid in their book, but they are less novel today and are often implemented with simpler tools. I'm sure the Gang would concur.
Other ideas may be less valid over time and I'd be surprised if the team didn't grow in their perspective.