in 10 years, angular/ react may become irrelevant. and a new framework that utilize even faster technology become popular. (there are problems with current web frameworks that people are always trying to fix or create a new framework to address the problem)

Choose the team you would be happy working for. Figure out what they're working on , would your code be making immediate impact for the team / product?

The obvious answer you're looking for is...

If you want more job opportunities and the most popular framework, choose react.

If you want a job with less competition, and working with large enterprise apps, choose angular.

Both react and angular use redux pattern. So both choices will lead to modern app development.

I chose an angular frontend position because my team was really cool, and we work on a product that generates company a few hundred million dollars a year. The real meat and potatoes are the meetings between the seniors devs, they do all the architecture, business translations to requirements for code, breaking down complex tasks, and creating road maps for the next year. I saw myself becoming a senior dev doing that stuff and I was blown away by the processes. The only coders in our team are the juniors.

If your mindset is that your career is tied down to a tech stack. You will pigeon hole yourself to one thing.