Stars are perhaps even more common in written text for highlights and annotations than typed text, at least around here. I can draw a star much faster than three asterisks. But it wouldn’t be very easily distinguishable as the Fediverse star. And that’s the same between the regular sharp and pointy star and the rounded outline one.
What are you moving away to? I’m assuming you’re still keeping your VPNs and DNS ad-blockers etc?