I first wrote the d62wp plugin when migrating bobbingwide.com from Drupal 6 to WordPress.
It doesn't do very much but it was a good starter for migrating content directly from a Drupal 6 site to a WordPress site.

In 2015 I used it during the migration of the website for TAGS - The Anchor Golf Society. I wrote a lot of extra bespoke code to perform the import of custom post types and their relationships. See https://github.com/bobbingwide/tags

In 2016 I used it to migrate a client's site. Again I wrote a whole load of bespoke code to cater for custom post types and relationships.

I also used it when converting bigram.co.uk.

Just now I've used it to import a much simpler site.
During the import I noted that I hadn't implemented any version control. Plus, I found a few things to tidy up. Hence this issue. Put the code under version control and make it work for PHP 7.2.
Someone may benefit from using it to help migrate their own Drupal 6 site.