Has there been any advancements with Ragged Arrays?

[bsaoptima]

Hi there,

I'm trying to build some code that would require to vmap over a list of arrays which I am aware is not permitted and I looked through discussions and it has been mentioned that the team has been working on ragged arrays.

Has there been any progress on this?

Thank you for your work!

[jakevdp]

In terms of public APIs, no, there's not really been any progress. @mattjj or @dougalm may be able to say more about design progress.