Most of the new stuff increases the time it takes to get work done, but Compose appears to reduce it by half on simple tasks, and a lot more on complex tasks. There's also some stuff on View tech debt which isn't less apparent, but I think Compose is here to stay.
The official tutorials are quite bad though. Probably better to try building something, paying for a book, or just reverse engineering something off GitHub.
Views and ViewGroups are kinda out. But ViewModels are still Good. I have no idea about Fragments and Activities and Intents. It's like every class in the system needs one of 3 badges: "Still a Club Member", "Stinky Poo Poo, DONT use this anymore", "Use if you have to, but we're hoping to make this go away some day, so keep your eyes out here."