Vanilla vs Flarum
I am a user of Vanilla and I love Vanilla, but...
Flarum present as a newcomer, but it seems to have seized the attention of many people. (As a modern forum)
Look at the enthusiasm of users on Github:
I know though Flarum is not yet released to the public, but it could further heat up the competition. Vanilla must continue to innovate.
The Text Editor, (good and stable without plugins) especially with BBCode features, Markdown, and HTML is very important to attract market demand.
Keep the spirit! Good luck!