Re:We’re pretty happy with SQLite and not urgently intereste...
by spilk on Sunday June 19, 2016 @07:58PM
(#11935362)
Wordpress does attempt some abstraction of the database via its various wrapper classes/functions like wpdb, WP_Query, etc. It's definitely not ORM-level abstraction by any stretch of the imagination, though.
Wordpress is also a PHP application, and it's common to have multiple PHP processes running in parallel, which makes it much harder to use SQLite.