The first DOCX demo looked great.

One page. One font. A small table. No headers. No section breaks. I thought the hard part was done.

Then a customer sent a real contract.

It had missing fonts, nested tables, merged cells, numbered clauses, headers, footers, page breaks, and a signature block that had to stay in the right place. Our clean demo became useless in seconds.

That failure changed how I think about Office preview.