PostgreSQL didn’t exist in the 1990s. It was called Ingres. Postgres started as a personal project and was first released in 1999, but was unusable. Around 2004 the project started getting popular and hipsters started screaming that MySQL didn’t have stored procedures and wasn’t fully ACID. Acid became a buzzword for PG fanboys, even though data corruption and memory leaks plagued the system for the first decade. It became a stable around 2008 as long as you didn’t mind restarting your database every few days. PostgreSQL didn’t really become a viable option until around 2010.
