That is such a problem in today's world. Of course you don't want to re-invent the wheel and all that, but we must be open to the idea of having to do it. Innovation stagnates if people suggesting redoing something are immediately seen as "dangerous, unprofessional or downright uneducated"
I think the issue is that you rarely get to see a neat new solution to a given problem. Usually you'll see some kind of half-baked attempted solution that's worse than the already existing alternatives.
The real problem is people who want to write a database never write one and have a very brief understanding of the domain and its complexities. Another problem is such database can became an engineering bottleneck. Other teams need new features easily found in a conventional db but “core team” unable to meet their demands. I’ve seen this in practice, result is a dead product.
