This is no where near true, might be true for spinning disks, but we haven't even really started to optimize RDBMSs for SSDs. Also sqlite is IO and ACID compli

This is no where near true, might be true for spinning disks, but we haven't even really started to optimize RDBMSs for SSDs. Also sqlite is IO and ACID compliant, it's just that the data generally fits in RAM where as many Postgres installs have data that doesn't fit in RAM.