I'm a Systems Reliability and DevOps engineer for Netdata Inc. When not working, I enjoy studying linguistics and history, playing video games, and cooking all kinds of international cuisine.
C++ templates aren't a good example though, people do way too damn much with them (see for example Boost or Webkit, both take way too long to build on even a good modern system because they are almost more C++ templates than they are actual C++).
If you're going for a good example of Turing completeness being essentially meaningless for deciding if something is a programming language or not, I would encourage you to instead look at Magic The Gathering.
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C++ templates aren't a good example though, people do way too damn much with them (see for example Boost or Webkit, both take way too long to build on even a good modern system because they are almost more C++ templates than they are actual C++).
If you're going for a good example of Turing completeness being essentially meaningless for deciding if something is a programming language or not, I would encourage you to instead look at Magic The Gathering.