WordPerfect to Libre Writer
First: Any fonts used in WordPerfect must exist on any machines that will use Libre Writer to access the converted documents. Otherwise, the text may fail to show (while other parts of the document, like comments, can show) or it will be rendered in a less-than-good font when opened in Libre Writer.
Second: Not every WordPerfect document will open well in Liber Writer. However, comments come through and most formatting. The only problem I had was with some special heavily formatted letter heads.
Third: Just changing the extension from wpd to ott was enough to transition the documents. To make those changes I created an AutoIt script for Windows that would go through the folders where my old WPerfect documents were and change the extension.
Fourth: There were a lot of WordPerfect Macros I had to go through. I created another AutoIt script that opened the Macro for editing, copied the text that appeared and put that text into a new *.txt document that had the same name as the macro. This gave me the ability to quickly look and see what each macro did. There were two main categories and I sorted them accordingly: simple open file, and complex do lots of things.
Most of the macros were meant to open the letterhead document then insert some text from another wpd document. For those, I ran a script to identify them, then create a shortcut directly to the other wpd document. The new rule became, open the letterhead template then insert the text from the other document. Of course, by this time that other wpd document had been renamed *.odt.
The more complex documents had to be dealt with individually. This was a real time buster but had to be done. Finding an alternative method of creating the same document in Libre Writer was intensive.