According to NS3.AI, a16z Crypto has raised concerns about the authenticity of many zero-knowledge virtual machines (zkVMs) available in the market. The firm argues that these zkVMs often require costly 'wrapping' processes to truly adhere to zero-knowledge principles. This recursive proof method necessitates substantial computational resources and trusted setups, which can undermine claims of transparency. a16z Crypto stresses that the fundamental value of zero-knowledge technology lies in privacy protection, a feature frequently overshadowed by the pursuit of faster verification and reduced proof sizes.