Mina Protocol - Small but Mighty

Key Insights

• Traditional blockchains are inefficient in storing their constantly growing data. This problem of state bloat negatively affects the network's decentralization because fewer users can participate in chain validation.
• Mina Protocol is a new-gen Layer-1 blockchain that addresses state bloat. Mina stays a fixed small size of ~11 kB by the power of zk-SNARKs. Beyond decentralization, zk-SNARKs also make Mina more private and efficient than other chains.
• Other new-gen blockchains have optimized for scalability in the blockchain trilemma, compromising on decentralization in the process, but Mina has prioritized decentralization. Theoretically, any smartphone or browser could run a full node on Mina.
• However, many of these groundbreaking features for Mina are still under development. The product roadmap is ambitious; the team's ability to deliver will decide the success of the protocol.

According to the blockchain trilemma, any improvements in any one of the three desirable goals of a blockchain — scalability, decentralization, and security — come at a cost to the other two. As blockchain technology has improved over the years, the latest generation of blockchains has had some success in overcoming the trilemma. They have focused on scalability, improving throughput by several orders of magnitude but making various trade-offs to decentralization and security. Solana, for example, has >1,000x transaction throughput of Ethereum but requires its validators to use industrial-grade hardware and commit to consistently upgrading it. This impedes decentralization as the broader community is priced out from taking part in chain validation.

The older generation of blockchains such as Bitcoin and Ethereum continues to suffer from low scalability because they prioritize decentralization. However, the decentralization of even these blockchains is under pressure as their size now exceeds hundreds of gigabytes, thus raising the requirements to run a full node. The responsibility is then left to enthusiasts who can afford to spend significant resources towards the good cause of decentralization. In the blog post "The Limits to Blockchain Scalability," Vitalik Buterin warns against significantly increasing a blockchain's parameters to meet the demand for block spaces because it could lead to "extreme centralization" if the average user is unable to run a node.