[PP1] Considering switching to another library to batch XLSX files because of performance on large files

Looks good , nothing pops up as a red flag.

+1 to RTBC.

✨ Any plan to integrate Box/spout ? Active was committed to XLS serialization module so I think this is ready for review.

Perhaps we should be checking that the sub module xls_serialization_open_spout is enable rather than just the open spout library exists 🤔

Leaving for needs review for approach - but likely needs to go back to postponed until there's a released version so we can properly test with the xls serialization module changes.