I've been using the forums for nearly twenty years and there are hundreds of those I've been registered to.
My favorite forum platform has always been phpBB.
About ten years ago I chose Joomla! as CMS for my websites, since then I always wanted to be able to integrate Joomla! and phpBB but I've always seen bridges as a constant source of problems.
I have always looked at Kunena as an alternative to phpBB to use with Joomla!
After repeated evaluations and postponements, now seemed the time to migrate to Kunena, but after a couple of weeks of attempts and deepenings, I came to the conclusion that the most reliable solution is still phpBB.
In fact, Jooma! docet