Interesting that some communities (apparently physics) use "arXiv" with the definite article ("the arXiv"), but in machine learning / CS we always say simply "a

Interesting that some communities (apparently physics) use "arXiv" with the definite article ("the arXiv"), but in machine learning / CS we always say simply "arXiv". I went and checked, and the official site doesn't use an article (https://info.arxiv.org/about/index.html https://info.arxiv.org/about/index.html)