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kotlinlang

why the use of a sealed class / object rather than enum?

Enum is good too.
 I use sealed hierarchy if in the future I need to allow data to be provided in the stream. IE: 
```data class Loosing(val maxMsToLive: Long) : Connectivity()```

&gt; also someone correct me if im wrong but it seems to be that `Subject` usage can sometimes be a code smell
Yes, Subject is a code smell from my point of view.. try to hide it from your api

do you think its more to hide from the api rather than not to use?

like is it so bad to use a subject or to expose it as a subject?

Using a subject is okay, there are good usecasees for it. exposing a subject opens up too many possibilities, hiding it behind your api restricts the usage to your usecase.

thank you for the response here - its rare i get to use a switchmap for an actual use