I don’t know why they got rid of hangouts. It did the job.
Many factors, some telecommunication regulations, too many same product / service with diff segment, unable to standarized their app to so many phones with diff brand, etc
Now they are trying to merge the hangout user to google chat, which initially should be for their workspace users. And who know what will it becomes later on.
Same with youtube red, youtube tv ? I don’t even keep track of what they call nowadays.