The importance of block sizes, and the rise of off-chain solutions

A number of blockchain projects have exploded in popularity in recent months, but their block sizes have stayed the same. What’s the answer to this looming scalability crisis?
Source: The importance of block sizes, and the rise of off-chain solutions (https://cointelegraph.com/news/the-importance-of-block-sizes-and-the-rise-of-off-chain-solutions)
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