Gall's Law: > A complex system that works is invariably found to have evolved from a simple system that worked. A complex system designed from scratch never wo

Gall's Law: > A complex system that works is invariably found to have evolved from a simple system that worked. A complex system designed from scratch never works and cannot be patched up to make it work. You have to start over with a working simple system. A SQL database, maybe supplemented by a cache, can carry most projects as far as they'll ever go. And if you outgrow it, replace it with something that meets your new needs. Any given project's "right tool for the job" can change over the project's lifetime, and optimizing for problems you don't have is quite harmful.