At the current point in time Blockchain very much seems like a solution we are desperately trying to find matching problems to. In a recently released report from MERLtech researchers, it is explained they couldn't find any data supporting the effectiveness of blockchain technology over existing solutions.
Although this hasn't seemed to be the most extensive research, it does make me wonder if there are any statistics out there of Blockchain projects that either
a) Solve a problem that was unsolvable before Blockchain technology
b) Solve a problem way more effective (in either productivity, scaling, trust or otherwise) than it is solved with proven technologies.