MySQL, MariaDB, PostgreSQL, TimescaleDB, CockroachDB, YugabyteDB, Teradata, Snowflake, TiDB, SQLite, DuckDB, and more probably.
I think it's led to great choice and a great sharing of ideas. Theres also been a lot of failures too, that's true, but I'm sure some of those failures have led to a few unique features across those products too.
So now with AI, for me it's the same process, just accelerated. Yes, there is lots of junk coming out there, but I think there's lots of good too.