I feel like CRUD can be a simplistic categorisation at times. Take a look at the Slack app, for example. It's got chat messages. Also rich media. And threading. And user profiles. And notifications. But each of those is "just" CRUD. That doesn't mean it's a walk in the park. By broad definition just about every piece of software ever created is CRUD.
I’m working on a realtime video conferencing service. Lots of long running connections with state updated by streamed events. React works pretty well for this use case imho. Not a lot of CRUD there.
"The dirty secret:
We’re all just building CRUD apps."
Honestly, this is something I've been struggling with coming to terms to for a while.
Really, what mobile app isn't just a CRUD thing? Literally every 3rd party app I can think of on my phone talks to some REST service in some way. Even the video games, photo editors, notes apps, etc. They all use the cloud where the cloud contains most of the business logic and the app is a thin visual client proxying the data.
You could argue that, for example, a first person shooter is not CRUD heavy. But after the match, when you're looking at leaderboards or sending friend requests or chatting with your friends in the lobby...guess where that UI is updating from?
Yep, another CRUD API. It's everywhere. I really want someone to prove me wrong because I want to expand my horizons - what the hell isn't a CRUD thing these days, other than completely offline apps?