Hi @alexanderpilhar,
Thanks for that reference blog. It also references a Stack Overflow link that adds more context and even more considerations. Even with those references and the idea of finite vs. infinite Observables, I'm thinking that one of the unsubscribing approaches should still be top-of-mind as developers use Observables.
My main concern was that the ASP.NET Zero Angular code uses a lot of .subscribe calls without subsequently unsubscribing using any approach (in most instances). I'm a little less concerned about that now since it seems most usages are of the "finite" variety, but it still seems like an improvement area that ASP.NET Zero needs to make in their Angular approach.