No, not even close. By 2006 all sorts of load-bearing infrastructure was relying on Google (e.g. Gmail). Today LLMs are still on the edge of important systems, rather than underlying those systems.
Things like BERT are a load bearing structure in data science pipelines.
I assume there are massive number of LLM analysis pipelines out there.
I suppose it depends if you consider non determinist DS/ML pipelines "loadbearing" or not. Most are not using LLMs though.
3D parts regularly are used beyond prototyping though as tooling for a small company can be higher than just metal 3D parts. So I do somewhat agree but the loss of productivity in software prototyping would be a massive hit if LLMs vanished.
One could have said the same thing about Google in 2006