Two Major Design Flaws

Throughout the time I spent developing longevity, I've made any number of major design flaws. The vision I started out with has changed drastically over time. It's evolved as I experimented with developing the longevity API. While my core guiding principles have stayed in place, the early versions of the library are nearly unrecognizable when compared to the latest version.

Since the beginning, I've had a comprehensive test suite, that has allowed me to correct mistakes and simplify my API with ease and assurance of correctness. And working with the API as it has grown has allowed me to spot problems as I moved forward. But there were two major design flaws that remain in place. Both of them have been nagging me for many months now, until they have become clear in my head. Now I'm ready to admit and address these two errors: the failure to use shapeless, and the lack of column-oriented storage of persistent entities with column-oriented back ends such as Cassandra and SQLite.