theory https://en.wikipedia.org/wiki/Massively_parallel vs https://en.wikipedia.org/wiki/Computer_cluster cool diagram js lib https://mermaid.js.org/intro/ pandas alternative https://github.com/pola-rs/polars (written in rust) prometheus alternative https://thanos.io/ airflow alternatives https://github.com/prefecthq/prefect https://argoproj.github.io/argo-workflows/quick-start/ data warehouse alternatives (to BQ / Redshift) https://kylin.apache.org/ https://doris.apache.org/ https://druid.apache.org/faq/ dataviz alternatives (to Power BI / Looker Studio) https://superset.apache.org/