according to the linked article, it sounds like it is for performance reasons.

I’m just going to use this opportunity to publicly grieve again for Winamp fake becoming open-source: https://hackaday.com/2024/10/16/winamp-taken-down-too-good-for-this-open-source-world/

GitHub here: https://github.com/allenai/OLMoE.swift

Ai2 make as much of their training data available as possible: https://huggingface.co/datasets/allenai/OLMoE-mix-0924