Looking Back at Postgres
Totally off-topic, but anybody who is into databases should at least have heard the name dBase, which was the most successful database in the 80s. However, they totally fucked up the release of version IV, which had serious reliability issues (not something you want in a database, in case you did not know). This lead to a dramatic decline and eventually the death of dBase. Who knows how the database and software landscape would look like had they released a version without major bugs.