We work closely with majority of research labs / model creates directly. Most of the times we will support models on release day. There are sometimes where the release window for major models are fairly close - and we just have to elect to support models where we believe will better support a majority of users.

Nothing out of spite, and purely limited by the amount of effort required to support these models.

We are hopeful too -- where users can technically add models to Ollama directly. Although there is definitely some learning curve.