> None of that requires OS maintenance. My house plants require far more maintenance than my software. I sometimes forget where some things run because I haven't touched them in years.

Then how do you know they are still secure and even working?

Yes, deploying servers is very easy, maintaining and securing them is the hard part. Sure, you can automate the updates and it will work with a good OS-Distribution for some years. But no system is perfect, exploits are everywhere, even in your own configuration. And then it becomes tricky to protect your data.