I finally was able to strike the EBCDIC TODO-item. After Karl and I got perl-5.32.0 built on z/OS EBCDIC native with dynamic loading and threads, the next step was to get Text::CSV_XS passing all tests on it. We need a goal, and this one was a real challenge, but it now works, out of the box! (I updated the TODO list in the OP)

I just released 1.44, which was also tested with the new (not set in stone) defaults that the core development team envisions for perl-7, and everything passes \o/

Check out the updated tools: csv-check and csv2xlsx.

1.44 - 2020-07-22

• EBCDIC now fully functional
• Prevent false negative CPANTESTERS fail reports
• Fully tested on perl-5.32.0 and perl-5.33.0
• Fix partly decoded fields in header (found by Eric Brine)

1.43 - 2020-05-27

• Add --parser-opt=value to csv-check
• Add -L & -X to csv-check
• Fix undef value in attribute setters for strings (issue 24)
• Document quote (undef) is not supported

1.42 - 2020-05-19

• Update to Devel::PPPort-3.58
• Unicode fixes for csv2xls and csv2xlsx
• Add internal buffers to cache diagnostics
• Fix positional reporting in examples/csv-check
• Allow passing CSV parsing attributes to csv-check
• Proof reading - doc fixes by Klaus Baldermann <soonix> (PR#21)
• Fix type caching (RT#132344)
• Small doc fix by Nick Tonkin <1nickt> (PR#22)
• Fix sep=; being ignored in ->header (issue 23)

1.41 - 2020-02-16

• Update to Devel::PPPort-3.56
• csv2xls uses sheetname as csv2xlsx
• csv2xlsx: support images (each image gets its own tab)
• More docs. (Data validation)
• No binary literals in fixed error messages
• Fix auto_diag > 2 to die when headers are used (issue 19)