It’s not going to completely die (soon), but it’s lost what used to make it special/different. Just look at the posts topping the popular subs - it’s a shadow of its former self. Unfortunately I can’t see anything really replacing it either. Times have moved on, I guess…

Go to “communities”, select “all” and search for the subreddit equivalents you want. Then you can subscribe to them - their posts will be visible when you browse by “subscribed” on the main page. “Subscribed” is basically the equivalent of “Home” on reddit.