The post discusses the necessity and validity of blockchain technology, presenting several questions to evaluate if blockchain is appropriate for a specific use case. The commentary surrounding it suggests a shift in perception regarding blockchain, with skepticism towards its applications outside of cryptocurrencies. Critics argue that many blockchain implementations fall short, often being used for less noble purposes such as money laundering and fraud. The conversation highlights a long-term trend of disillusionment with blockchain's promised benefits, with some suggesting it may be a 'technique failure' and questioning if AI will follow the same path.