If the reason for leaving X is a 97% drop in impressions, explain moving to Bluesky and Mastodon where you'll get even less. The numbers argument is a fig leaf. This is an ideological decision dressed up as strategy, and that's fine -- just say that instead of pretending it's about data. As for "ad hominem" -- pointing out that the person making the decision has an advocacy background, not a growth background, isn't an attack. I am providing context for why a "data-driven" post reads like a manifesto.