Understanding Kate documentation

Circumstances:
I'm reformatting the appearance of "KJV Cambridge Paragraph Bible"
[ https://ebible.org/Scriptures/engkjvcpb_html.zip ]
The text of each Bible chapter is a single HTML line.
[ e.g. the text of Psalm 119 is a line >30 kB long ;]
Problem with Kate documentation:
https://docs.kde.org/stable5/en/kate/katepart/config-dialog.html#pref-open-save

Line Length Limit
     Unfortunately, due to deficiencies in Qt™, KatePart experiences
poor performance when working with extremely long lines. For that reason,
KatePart will automatically wrap lines when they are longer than the
number of characters specified here. To disable this, set this to 0.

I understand "... wrap lines ..." to explicitly assume a visual presentation is active.
When I'm manually editing a chapter I use Kate's GUI.
It defaults to a read-only mode with a warning message asking if I wish to raise the limit.
Questions:
1. What would the observable difference be between setting that
    "Limit" to "0" or setting it to >= ~30 kB?
2. What effect does this limit have when using command line mode.
    After I've determined what changes I want to make to *ALL*
    1000+ chapters I'll write a script to do all in one fell swoop.
    Note: I haven't yet experimented with even the simplest things
          in command line mode.
3. Is there a Kate user mailing list or appropriate USENET group.
    The only list I've found is a developer's list.
TIA