refactor: use ABC's for `Remote` base class instead of a plain object

This would make the interface more explicit.

[Suor]

Not a big fan. It won't make our code any significantly easier to read, we are not writing Java after all.

However, there are possible big gains from separating remote and cache functionality.

Let's close it then, @Suor , I also think it is better to rethink remote and cache 👀