I love LiveView + Svelte!

(I gave the talk at ElixirConf 2022 on how to combine them, but the live_svelte contributors have done the work to make it a reality)

IMO there is always a need for client side state, especially for apps with rich UX. I also live in NYC where network connectivity is not a given, especially in transit.

One super powerful feature that the authors don't cover is being able to use Phoenix's pubsub, so that server-side state changes that occur on other servers also get pushed reactively to any client. It's pretty typical to have multiple web servers for handling mid/high levels of traffic.