From the article: "Claude Code can rip out one service and replace it with another in minutes. ..."

Doesn't that assume there are many interchangable services available on the web which essentially do the same thing?

I can see this would be the case if there were many online services for say compiling C++ code. But for more human-centric services, are there many "replaceable services" out there? An API is not only its syntax, but also its semantics.