Web 2.0 was going to be a new social media world wide web, but some things did not come to fruition.

1. Personalization: The promise of personalized content and experiences based on user data was never fully realized. While algorithms and data analysis have improved, many users still feel that their online experiences are not tailored to their preferences and needs.
2. Privacy: Web 2.0 was supposed to usher in a new era of privacy protection, but data breaches and privacy violations have become increasingly common. Many users feel that their personal data is not adequately protected.
3. Collaboration: Web 2.0 was touted as a platform for collaboration and user-generated content, but the reality is that a small group of users often dominates online discussions, and fake news and misinformation can spread rapidly.
4. Interoperability: Web 2.0 was supposed to enable interoperability between different platforms and services, but walled gardens and proprietary technologies have made it difficult for users to move their data and content between different services.

However, we have now many more choices in social media, with Twitter and Facebook having rich API’s as a bonus. Also the growth of virtual machines, i.e. hypervised sharing of bare metal has become ubiquitous. Analysts that told the story of Amazon’s investment in computing ala carte were correct in predicting the major changes that ensued.

We still hear promises of things like “better security and no passwords” but with the hacks of password manager sites recently, we’re still waiting.

Web 3.0 is an evolving concept that refers to the next generation of the internet, which aims to build a more decentralized, open, and user-centric web. Some of the promises of Web 3.0 include:

1. Decentralization: Web 3.0 aims to reduce the power of centralized entities, such as large tech companies, by creating decentralized platforms that are controlled by a network of users.
2. Greater privacy: Web 3.0 aims to give users greater control over their personal data and privacy, through technologies such as encryption and distributed ledger technologies.
3. Interoperability: Web 3.0 aims to create a more interoperable web, where different platforms can communicate and share data more easily, allowing for greater collaboration and innovation.
4. Improved user experiences: Web 3.0 aims to create more seamless and intuitive user experiences, with technologies such as artificial intelligence, natural language processing, and virtual and augmented reality.
5. Enhanced security: Web 3.0 aims to create more secure platforms by using advanced cryptographic techniques and consensus mechanisms to prevent hacking and fraud.

Meanwhile, the evolution of two-factor authentication has done much to create a foundation for better security and privacy.