My understanding is that kbin is even less mature than Lemmy.
Also, OP stated that they've weighed up all available options (which would obviously include kbin) and to please not suggest things in this thread, I guess because of getting bogged down in semantic arguments rather than discussing the community aspect.
Yeah, I'm old so I tend to gravitate towards forums by nature, lol ... it's a mature and proven way of working, though harder to maintain momentum on compared to an aggregator like this