Maybe their objective in submiting to the ietf is to get programs like Excel to start supporting it.
That’s… not how Excel/Microsoft works.
Yes you're exactly right.
Can you not customize the separators used when importing csv-likes into excel? Libreoffice has a neat little window for it that even shows a preview of what values go into which cells.
Sure if you want to stop and fiddle with Excel.
If you want to just double click and get to work, no.