It is way easier to store the pages in a key/value db than storing them in separate files. And I don't need to implement concurrency access control as it is dea

It is way easier to store the pages in a key/value db than storing them in separate files. And I don't need to implement concurrency access control as it is dealt by LMDB. It leads to an easier implementation and robustness, as the main data processing is done by SQLite and LMDB. LiteTree is something like a glue, and the code is simple. What leads to better maintainability.