But I’m not sure I agree on your definition either. Looking at Wikipedia, semantic web is described, first as Web 3.0 (not to be confused with web3) but I remember it more as a dream of late 90s early 2000, where all data lived on internet accessible urls and had semantic markup, than a tech stack.
I find this distinction to be rather ridiculous. They both semantically(heh) proclaim to be the next version of the web. I see there's a bit of an edit war on https://en.wikipedia.org/wiki/Semantic_Web over the one true web 3.
It's just an arbitrary name where people have incremented a number for something they wanted to be the next big thing. Realistically I think you could only really numerically name the next thing after it has actually successfully been adopted.
I actually use these technologies in my day job (and have been for several years), so it's not just a wikipedia look-up for me. Maybe that's why I think of it in more concrete terms.