[likis]

For managed products, upgrades are often automatic and there is almost no maintenance that needs to be done. At least that is my impression when running stuff in GCP. For example:

* CloudSQL Postgres, automatic minor/patch upgrades, they working on seamless major upgrades. Automatic disk increase. You would only need to make sure that you have enough resources in terms of CPU/Memory. * PubSub, no maintenance or updates required.

It is more work to keep java and the related dependencies up to date. We use renovatebot to help us automate things like that.

In my experience it is very easy to change and setup the managed products, I declare them in code using terraform and then I don't have to do much at all. This is what is so awesome with the cloud managed products.

If you are trying to be cloud agnostic, then you are just treating the cloud as another datacenter, and then you don't really get any of the benefits of using cloud specific managed products. Then you need a professional to keep maintaining your infrastructure.