Well, first, vue.js doesn't force you to use components. So you can just throw your data into the HTML page and see what happens. It's a huge win in the early phase of the project, as most of the time your page will change so much you will not see any reusable components before months. It's a real time saver, and let you refactor only the important parts in components later.
Secondly, you are not tied to JSX. While you can use JSX with Vue, it comes with a very simple and clean templating language that is much more natural to manipulate than mixing JS and a fake HTML.
What's more, you don't need webpack, not even babel to use Vue. You can actually drop the 30ko (gzip + minified) of the lib and create a decent projet as-is. Of course you can later setup a whole pipeline, with even server side rendering if you wish. But for a start, you can just use it as easily has you used to with jquery. Which means people comming to the project will be easy to train to: it takes one afternoon to comprehend react hello world. It's the time to understand the whole Vue lib.
Eventually the community is great : the doc is well written, the tooling is full of small details (such as .once.prevent or the dict classes) that makes your life easier and the API surface is kept small. Most third party tools adopt the same philosophy: pragmatic, useful, scale down then up.
Honestly after so much react, I'm happy I found Vue. It's just better. Doing training for both, I can also tell you that training for Vue is 2 orders of magnitude easier than react.
Vue is what react should have been really. But let's not blame react. The react dev created shoulders for the vue devs to stand one.
To help put this in perspective, how heavily did you use React before switching to Vue? How did you feel about it at the time, before you were aware of Vue?
I used react for one year, for the web, but not react native. I'll be honest: once I got fluent in react, I still didn't enjoy it.
Too much scrolling around, looking up the doc for every simple things, hard to integrate with legacy Python/Ruby/PHP frameworks, etc.
I went from jQuery then Angular 1, and was much less productive in React.
Also, introducing react to a new member in the team has always been dreadful.
All in all, I never benefited from the concurrency part. The performance yes, and the structure for the SPA. But the whole immutable constraint didn't pay off for me in the end, so I felt my stack was overkill.
