Transactions aren't the only thing which makes cryptocurrencies useful, and even then, cryptocurrency transactions aren't directly comparable to each other or t

Transactions aren't the only thing which makes cryptocurrencies useful, and even then, cryptocurrency transactions aren't directly comparable to each other or to transactions in traditional financial systems since they can have a much different risk profile. Furthermore it's not obvious that increased transaction rates are necessary yet in most cryptocurrencies and so it might not make sense to optimize for that yet. There is no point encouraging frivolous data to be added to the blockchain permanently if the demand to make useful transactions isn't there yet.