Let me try to summarize my view on those benefits:
• Convenience and confidence that your system is healthy,
• scale - no need to worry about your API server not being able to handle concurrent requests or DB being overwhelmed with too many connections, load or storage being full,
• fully managed and 24/7 monitored orchestration API - no need for extra full-time engineers keeping the system healthy
• upgrades to new versions incl. DB upgrades which may be challenging to prevent any data loss or instability,
• multiple workspaces to easily handle and switch between dev, staging, UAT, and production environments, or being able to spin up separate workspaces for different teams
• team collaboration and permissioning features incl. Auth, RBAC, auditing
And there are likely many other features or important aspects I'm not aware and you'd be better off talking to
sales@prefect.io about it. I hope this gives you enough pointers on things you need to consider - the main factor, in my view is the value of your time - you can always maintain and build extra features on top of an OSS product, but do you have the capacity for it? this is one of the main questions you'd need to look at