Who has "an" application server though? Those of us who came up through PHP/Rails/Flask and even much of the modern microservices world were taught to do statel

Who has "an" application server though? Those of us who came up through PHP/Rails/Flask and even much of the modern microservices world were taught to do stateless, probably load-balanced application tiers with shared DB, maybe cache, maybe message queue. Both for scalability and redundancy. Redundant SQLite is not impossible [0] but it is definitely less mature and well-known than replicated MySQL or Postgres. [0] https://litestream.io/ https://litestream.io/