This point is echoed by the creator of SQLite, Dr Richard Hipp, in his excellent talk "SQLite: The Database at the Edge of the Network". [1] "SQLite doesn't compete with client-server databases, it competes with fopen"

(I highly recommend to watch it, if only to get a sense of the smart and funny energy that Dr Richard Hipp puts off!)

[1]: https://www.youtube.com/watch?v=Jib2AmRb_rk