That's a very valid concern. What kind of maintenance though? Most of the examples in this article are very simple. Maintenance might involve iterating on features, no real live services that would require any work.

Security patches though, yeah, that's tougher. My position is that if security is a concern, you need to hire someone. As much as many of these tools can integrate with databases and set up auth, I'm not sure how much I trust it personally. Especially if the actual code is hidden.