Xgboost v2: release schedule and API breaking changes

I’ve seen (https://github.com/dmlc/xgboost/projects/2) that there is a work in progress on the new major version of xgboost v2.

Do you have an idea when its first stable release will be rolled out? Do you have a list of breaking changes planned in the model’s API?

I am asking these questions since I am currently working on a custom model that is based on xgboost and heavily depends on it’s API.

The real breaking change is the removal of gpu_hist and the introduction of device parameter. There will be some deprecation warnings like DeviceQuantileDMatrix but these features are expected to work for a few more releases.