None of those platforms ever saw the light of day. The few platforms that _did_ see success were the ones that were built quietly, the platform designer also became its first author and created a viable, interesting game in the platform to prove its value.
I think the proponents of web3 need to stop marketing/pushing it and just go build something. If/when you have something clearly viable, then the rest of us will take a more serious look at what you've invented.
And your users/customers can't just be crypto adherents. That's always going to be a limited subset of Internet users. You have to build something _easy to access_ with _clear benefits_.
Until then, it's just more vaporware.