Justus Magin

I would be fine with adding `DataTree` and `open_datatree` to the top-level module in this PR: adding documentation for `DataTree` to me means that we're publicly exposing it. The only...

> Is the policy working as designed yes, it is: we guarantee support for at least 24 months, and only drop support once there's another version of python that was...

In the meeting today we decided to both change the min-versions policy for python to 30 months, and to add a release table (something like the one in NEP29, but...

reopening so I can keep track of the second task: creating and automatically updating the support table

[SPEC0](https://scientific-python.org/specs/spec-0000/) has a nice script that creates a visualization of the supported versions using the versions available on PyPI, we can probably reuse some of their code.

the only time we call that function is when preparing arguments for `where` (and for `concat` / `stack`, but there we don't expect to encounter python scalars), which as far...

I'm not sure, but I think that was referring to a situation where you have no explicit dtypes, just (compatible) python scalars. In that case, we'd have to make an...

> Can I ask what you are doing with the calculated size? Mainly for user information. Among other things, knowing the size of the variables in a newly opened dataset...

I would forward `copy` to the wrapped array, but in any case this is not urgent, since not having that argument will warn, not raise. #1960 is a documentation-only PR...

> While I am open for discussion Upper bounds on a library's dependencies are usually [not a good idea](https://iscinumpy.dev/post/bound-version-constraints/), so I'd be -1 on that: without the upper bound people...