This! So many wasted years of engineering making correct applications on top of Cassandra/Kafka/Elasticsearch when a single Postgres server could have handled e

This! So many wasted years of engineering making correct applications on top of Cassandra/Kafka/Elasticsearch when a single Postgres server could have handled everything no problem. Scalability for a tech product should be a concern at some point, but if you don’t have product market fit it doesn’t matter. The complexity of building a distributed system right out of the gate will cripple rapid iteration or lead to a broken product.