I'm not exactly new here as I'm lurking around since some days now. I'm really liking how Flarum is being developed. I wanted to move to Flarum from my myBB forum and after searching my ass off how to do that I gave up and made my own migrate script.
Some people will say "You could've go from mybb to phpbb to flarum" but really, it didn't work.
I've published the script on my github: https://github.com/MichaelBelgium/mybb_to_flarum
Feedback is welcome - and help too!
PS: mybb version is 1.8.19, flarum beta 8