Two large marketplaces in my country I know of have their own self-hosted PaaS (I know some of their devs personally). They're microservice-driven and have many

Two large marketplaces in my country I know of have their own self-hosted PaaS (I know some of their devs personally). They're microservice-driven and have many small teams. One of their devs showcased me their platform where a small team can launch a new microservice with a few simple configs/CLI commands without having to know anything about infrastructure (it has built-in monitoring, logging, scalability options, discovery etc., full package). I guess it lowers costs because they have a lot of traffic. And they made it super easy to use for small teams with no cloud expertise. Faster deployments because each small team manages their microservices on their own. Plus, no vendor lock-in. I can imagine the pain of migrating 3000 microservices off a vendor. However, I think for small companies self-hosted PaaS is an overkill. Those companies have dedicated teams who work solely on PaaS.