The discussion around IPv6 highlights significant design flaws that have hindered its adoption. Key criticisms include the complexity of 128-bit addresses, which are cumbersome to remember and input, and the user-unfriendly formatting involving colons, which complicates their usability. Additionally, the reliance on DNS for IP address resolution is seen as a limitation, as it requires additional infrastructure and can create fragility in network configurations. This combination of usability hurdles has led to frustration among users and engineers alike, suggesting that the way IPv6 addresses are presented has substantially contributed to its slow acceptance in the market. There’s a call for a reevaluation of how addresses are formatted to make them more accessible and less intimidating to the average user.