Ning to Buddypress- Member profile data, check! But what

Ning to Buddypress- Member profile data, check! But what about the rest of it? The member profile worked beautifully. But I'm curious if there has been any success in importing or moving over all the other data like discussions and comments? I get as far as having a bunch of .JSON files with backup content from Ning, and any additional plugin I find ended its effectiveness about 2+ years ago.

I guess I'm like the last Ning user left to migrate to Buddypress :slight_frown: