Sure, you don't have to but that is the whole point of Clouds.
Otherwise, using regular old-school hosting providers is much, much cheaper.
> and there are some abstraction you can do to make things portable.
I would disagree with this point.
I'm sure that there are some APIs that try to abstract out the Cloud service used but in the end you are tied to the pricing and technical specificities of each service.
If I want to use a file storage service, I need to know how to authenticate to it, handle the access control, host static sites with it, handle CDN integration, configure access logging, etc.
All of this is possible in multiple cloud services but will be different for each provider. That is sufficient enough for it to be a leaky abstraction.
There's plenty of value in just the block storage and compute at the large cloud providers, and these are not difficult to abstract. I know because I've done it. Yes, some of the abstractions are a bit leaky, but all those leaks are variables in our helm chart. My application code is written so that it doesn't care where it's running, nor does it need to know.
> in the end you are tied to the pricing and technical specificities of each service.
That's one of the primary driving factors behind our decision to design our application to be portable.
Sure, you don't have to but that is the whole point of Clouds.
Otherwise, using regular old-school hosting providers is much, much cheaper.
> and there are some abstraction you can do to make things portable.
I would disagree with this point.
I'm sure that there are some APIs that try to abstract out the Cloud service used but in the end you are tied to the pricing and technical specificities of each service.
If I want to use a file storage service, I need to know how to authenticate to it, handle the access control, host static sites with it, handle CDN integration, configure access logging, etc.
All of this is possible in multiple cloud services but will be different for each provider. That is sufficient enough for it to be a leaky abstraction.