You may determine your application as stateless because the datastore function is handled by another pod or system. However, there are some pitfalls in that sometimes; applications actually store important files that you aren't aware of. For example, Grafana (https://grafana.com/grafana) connects time series datasources such as Graphite (https://graphiteapp.org) and InfluxDB (https://www.influxdata.com/time-series-database/), so people may misunderstand that Grafana is a stateless application.
Actually, Grafana itself also uses databases to store user, organization, and dashboard metadata. By default, Grafana uses SQLite3 components and stores the database as /var/lib/grafana/grafana.db ...
