Any interest in proposing this package for inclusion in either GNU or NonGNU ELPA?

Packages in [`NonGNU Elpa`](https://elpa.nongnu.org/) can only depend on packages in core Emacs, [`GNU Elpa`](https://elpa.gnu.org/), and `NonGNU Elpa`. As such, currently, no package that depends on `org-special-block-extras` can be included in `NonGNU Elpa` (nor `GNU Elpa`).

Adding this package to either `NonGNU Elpa` or `GNU Elpa` would alleviate that. Additionally, both `GNU Elpa` and `NonGNU Elpa` are enabled by default in recent Emacsen, so adding this package to either would also reduce the friction for new-users.

For situational awareness: Contributions to `GNU Elpa` require copyright assignment paperwork to be completed. Contributions to `NonGNU Elpa` don't require copyright assignment.