Vitalik Buterin argues that open-source incentives are most effective when balanced and realistic, and sees copyleft as a more beneficial tool today than it was 15 years ago

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Incentivizing open source is most valuable when it’s neither unrealistic nor guaranteed, Buterin said, adding that the benefits of copyleft are much greater today than they were 15 years ago.

Buterin argued that copyleft achieves similar diffusion goals in a neutral, decentralized way, without favoring particular actors or requiring top-down enforcement, describing it as a “broad-based and neutral way of incentivizing diffusion.”