Year of the Voice - Chapter 1: Assist

Curious why a DIY simple text context matching was used than maybe an existing such as GitHub - flairNLP/flair: A very simple framework for state-of-the-art Natural Language Processing (NLP).

Seems a great idea to do inference based control but looking through, as thought wonder what they are using for NLP to have a look at repo and curious why DiY the NLP bit?