If by web3 you mean crypto currencies then I ask you nicely to stop using web3 for that.

Web3 is things like json-ld and the like and it is tragic that scammers have been able to abuse the term for so long.

I’m not familiar with json-ld, other than a quick skim of a Google search that I just did. What is so revolutionary about it (and other technologies in the space, such as…?) that it represents a whole new revision of the web paradigm, comparable from the shift from static pages in web1 to interactive sites in web2?

It is not revolutionary. It is evolutionary just like web2.0 was. That is kind of the point.

But together with other, similar technologies it extends the current with metadata etc web just like web2 extended the existing web with things like ajax interactions, drag and drop and folksonomies ("tags") and other forms of user generated content.

The (IMO) fake crypto peddler "web3" is (again IMO) "revolutionary" unlike web2 and the real web3: it is a complete break from many of the things that made the web great. I'd even hesitate to describe much of it as web at all.

I'm really not a fan of crypto claiming the "Web 3.0" title, but the Semantic Web had its chance for many years, and at this point I don't think it gets to hold on to it anymore either.

Arbitrary server-chosen microtransactions make things worse in many ways even if the payment process is simple, fast, and free.

Please stop.

"web3" is nothing but another crypto-scam.

Wow, lots of luddites here for what's supposed to be a tech community.

Get your head out of your asses guys. There's nothing inherently bad about blockchain or decentralization.