I have been advocating similar setups to this for years, no one wants to hear it. I get downright puzzled looks from people who think you need moon-landing monitorability of every little service and database...
We have 100k paying users and most of them don't actively use our service, yet we have microservice slop with k8 and load balancers galore running in big tech cloud provider and document databases.
From our whole setup I can only think of _maybe_ one thing that should be split into a separate dedicated service, everything else could happily live in a monolith backed by a relational database and a caching layer and a storage solution.
We have 100k paying users and most of them don't actively use our service, yet we have microservice slop with k8 and load balancers galore running in big tech cloud provider and document databases.
From our whole setup I can only think of _maybe_ one thing that should be split into a separate dedicated service, everything else could happily live in a monolith backed by a relational database and a caching layer and a storage solution.