Just to address this: I would say that’s where the value-add of any managed service comes from. If you want smoothness, yes, you pay someone else to look after the administration and the virtualization environment and the mail server and the web server that reverse proxies the application server and so on…
With the self-hosted app server/runtime, you look after all of that yourself, including troubleshooting any misconfiguration, system integration, weirdness, etc. That’s the price you pay, so to speak.
I think the price of both routes are totally worth it, depending on your needs and how much you value your time 
Cheers,
Ken