I was curious about the relative time range, when something is considered "hot", and how long it takes to become "boring". Looking up the public release dates..

Listed as "boring":

- Postgres 1986

- Python 1989

- MySQL 1995

- PHP 1995

Relatively "hot":

- Go 2007

- Rust 2010

- TypeScript 2012

- GraphQL 2012

- React 2013