> Databases, kafka, the lmax disruptor, and reams of performance critical proprietary code have been and continue to be written in java. those have low bar of

> Databases, kafka, the lmax disruptor, and reams of performance critical proprietary code have been and continue to be written in java. those have low bar of performance, also they mostly became popular because of investments from Java hype, and rust didn't exist or had weak ecosystem at that time.