psvensson

Looking at your needs I can't find any reason to move from Firestore, if you're already using it. Could you describe possible things you have concerns over? In any case, using a cloud-based datastore (like Firestore or DynamoDB (AWS, though)) let you avoid running and maintaining your own database server(s). I would consider Firestore and cloud functions a bit of a sweet-spot, actually. The only thing you cannot do in a cloud function vs. a running server is cron jobs or other long-running maintenance taks or tasks needed to be done at certain intervals. but Google has a service that calls urls (as, for exaple cloud functions), so it can be solved that way instead.

I use Firebase because it scales. A firebase project support up to 100000 simultaneous clients. This a bit tricky to set up yourself (and costly) using redis clusters and so on. Also, firebase is a fully managed service so you need not install anything on any server at all.

I use JavaScript because the problems that jQuery solved at the time are now easier to solve using either just plain vanilla JS or lit-html (or go full on build-system react of course, if that is your thing)

To use Cloud Firestore as a data layer to have a fully managed and distributed noSQL database with no need to manage replicas, disc space or sharding has proven to be a very good idea. We're a small startup and need to focus all time on development. Being hampered by managing the data layer when growing is something we can now avoid.