This is a very loose roadmap for what/when major breaking changes should be expected in Gym and in what order (last updated September 6, 2022):

October:

• Wrapper overhaul
• Official Conda packaging

December:

• Vector API overhaul
• Native make_vec method
• Extensive envpool integration
• Functional API

February:

• Brax based Phys3D environments to replace MuJoCo environments that people can test out
• Brax based Phys2D environments to replace Box2D environments that people can test out
• Hardware acceleration for classic control and toy_text envs

March:

• Brax environments bug fixes as needed

April:

• Brax environments become permanent, box2d and mujoco environments moved to separate repo like robotics environments were

Future:

• Full type hints
• Alternate language support