Performance benchmarks:

I opened #322 on mesa-examples listing the examples that must be updated in line with this PR.

What’s your plan for the core examples in this repo?

They already moved away from mesa.spacewhen we added the deprecation warning. So nothing needs to be done.

At some point we should also write migration guide, update tutorial, etc.

I suggest we try to make simple changes where appropriate (see, for example, the removal of model steps). However, there will be an accumulation of changes coming, so it might be better to rewrite those completely once we are preparing the beta release of Mesa 4.