I use SQLite in production and it works great. You should understand whichever RDBMS you use, and how to get the best performance out of it. Previously I used

I use SQLite in production and it works great. You should understand whichever RDBMS you use, and how to get the best performance out of it. Previously I used Postgres extensively, and it worked fine, and before that I managed MySQL servers. They are all fine, but SQLite is as simple as it gets, and more than adequate for most workloads.