I just joined the listserv so apologies if this is not threaded in the original
discussion
https://stat.ethz.ch/pipermail/r-devel/2026-July/084631.html
A restating of the use cases from Kevin Ushey:
1. Language interop - C/C++/Fortran, Python via reticulate, Java via rJava,
Javascript / JSON APIs
2. Data structure interop - arrow, DBI (BIGINT), parquet, hdf5, zarr
There are use cases in both single-cell / spatial transcriptomics - big sparse
array where we need interop above or the ability to handle more than 2^53-1.
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