I'm old school as well, last time I had a "simple" project that didn't allow setting up a SQL RDMS I used flat files, and for system administration by users the

I'm old school as well, last time I had a "simple" project that didn't allow setting up a SQL RDMS I used flat files, and for system administration by users their presence in various directories and Windows' file manager back when it was simple, fast and good. Normally, though, I like independent enforcement of data integrity, and PostgreSQL is free, easy to set up and maintain.