As far back as 2015, it’s been common to take neural net inference and get a C++ version of it. That’s what this is.

It didn’t make python obsolete then and it won’t now.

Training (orchestration, architecture definition etc.) and data munging (scraping cleaning analyzing etc.) are much easier with python than C++, and so there is no chance that C++ takes over as the lingua Franca of machine learning until those activities are rare