Implementing reactivity is a non-trivial task. With Alpine, you get Vue's without the rest of Vue.

It's offers a syntax similar to a no-build VUE. This gives you a more standard, modern way of doing things that a lot of people already know how to do. And it does it without generating many thousands of files and dependencies just to create a "hello world" page. Most anyone that could figure out VUE code should be able to look at AlpineJS code and figure out what is going on. I could very easily use vanilla JavaScript to do everything. Good luck on you figuring any of it out in a timely manner if you inherited any of the code.

I'm mostly doing database CRUD with it. I'm really impressed with how easy it is to make a somewhat complex form with a minimal amount of (mostly clean) code.

That said, I do not really like the inline coding that they push in all the documentation. I much prefer separating the code using Alpine data(). It's much easier to debug.