@nilchak

i think you just misunderstood lemmyslenders original post.

he says the app manager won't install single .debs anymore, which IMO is a good thing. dependencies on rogue .debs can be a pain in the ***, and the users who can deal with that, are users who usually have no problem with dpkg in a terminal. well, they should be

adding third-party repos is no problem to end-users:
look at this video at around 0:40, you can clearly see the app manager catalogue management.