Maybe not in actual practice but FP made a specific fuss about peeling off the do his company thing. And stepping down etc.
One of the main goals of Tari is Monero success. Fluffypony emphasized this in his latest presentation on Tari & Monero, which I strongly recommend to watch:
https://www.youtube.com/watch?v=zmeSSnppixYAdditionally, he did not leave Monero. He is still actively participating in Monero's development.
Also all you guys went off to another forum (I know you are always here working hard - you had most of my merits over the years for it)
Most traffic is currently present on Reddit (r/monero for normal discussion and r/xmrtrader for investing / trading discussion). As far as I can see, this is simply a side-effect of people preferring Reddit over Bitcointalk nowadays. The latter has arguably also lost a lot of traffic over the years. Thus, I don't think the lower activity here is on purpose.