Should pins support parquet?

[hadley]

Maybe in preference to arrow? I think that it would be easier to argue that it should be the default for data frames (#666).

[juliasilge]

I keep getting confused about the difference between Arrow and Parquet so let me add this here:

Arrow is primarily an in-memory format, whereas Parquet is a storage format.

[juliasilge]

In pins for Python, we have type = "parquet" already. Check out the supported types for writing in the docs.

[github-actions]

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