In my case, I decided to keep using jQuery as opposed to React or other newer frameworks when I started building an app I was getting ready to update around 5-6 years ago. Not because I found anything negative about React.js and other, newer, JavaScript libraries, but because jQuery still does what I needed and I was familiar with it.
I have no doubt that React is a great choice for teams but end users don't care at all about what's under the hood, they care about usability and stability. What I cared about was my personal productivity.
If I were managing a team I likely would've used React.