Oh most certainly. We also have a ever growing list of JavaScript frameworks. Software developers are great at the NIH syndrome or not liking how something was solved and they like their way of solving it. Just because there is another solution path doesn't mean new solution paths to the same problem are void.
If you mean more efficiently then that is likely a dimension of the solution where it may not fit for some use cases. For example blockchain transactions are known to be slow when compared to say a RDBMS transaction. If you are recording purchases in a web shopping cart its probably not a good solution. The trade-off here is that for some problem, maybe the speed of the transaction is not a concern.
Don't get me wrong, I'm not defending, nor supporting blockchain solutions. Just pointing out that the "we have ways to solve those problems already" isn't a very valid argument in software.
If you mean more efficiently then that is likely a dimension of the solution where it may not fit for some use cases. For example blockchain transactions are known to be slow when compared to say a RDBMS transaction. If you are recording purchases in a web shopping cart its probably not a good solution. The trade-off here is that for some problem, maybe the speed of the transaction is not a concern.
Don't get me wrong, I'm not defending, nor supporting blockchain solutions. Just pointing out that the "we have ways to solve those problems already" isn't a very valid argument in software.