In the beginning of my career, I did an internship at a very small company that had been selling a desktop app for 20+ years, among other stuff. Each customer g

In the beginning of my career, I did an internship at a very small company that had been selling a desktop app for 20+ years, among other stuff. Each customer got their own database. The software was pretty stable and the team were part time consultants for that app, which mostly involved helping users perform complicated queries and creating stored procedures (they loved those). Subscription was allegedly quite expensive and had minimal churn over the years. For that kind of hyper stable software where each customer get their own database, I can see it working. In your typical 2023 SaaS where you are serving 1000s of users through a complex API and a database, I'm not sure a db can give you the level of flexibility and quality of life an API gives you.