until now when a streamer raided a channel it would be hosted too, so if you arrived late or the raid failed for you(happens every time on mobile when watching/listening in the background) you could hit the join button on the hosted channel.
with hosted channels, this is now gone.
the hosting system is reduced to just suggested channels.

if a raid fails or if your arrive late to a stream there is now no way to even see who got raided and no way to join in unless you happen to remember the exact name of who got raided.

an easy fix for this is to be able to see the just raided stream in a channel's carousel, either as suggested channel or a separate "just raided" card, at least until that stream ends.