The guys at Milvus raised a total of $113M according to Crunchbase, second only to Pinecone, which is funded by a16z. You're not going to highlight the main competitor of one of your portfolio companies.
The post mentions six alternatives to Pinecone. The reality is Milvus isn't as relevant today as it was a year ago. I'm from Pinecone but I'll give credit where it's due: Weaviate, Chroma, and Qdrant completely lapped Milvus in the open-source space. That's why they got mentioned and Milvus didn't.