Hello friend @qsyal

It makes sense your question, I did some research and I think the reason is because, Web 4.0 already has developers and marketing is linked to the development of applications from all the information that exists on the web but with a natural language and Speech to text technologies, while the concept that Jack Dorsey raises with his Web 5.0 project is practically to create technology that can run on the Bitcoin blockchain.

Best regards, be well.