For context, I'm in no way, shape, or form a modern front end maestro. I'm good with ES6, Jquery, Handlebars, and Bootstrap. I've done a little with the Angular 2. From that perspective.... What does this buy me over the other more popular frameworks? What are the chances that this won't be abandoned if it doesn't gain traction? It's also easier to recruit developers if you say your stack is built on the more popular…
My other rule of thumb when choosing a framework is what would happen if things go south, will I be asked by management why I chose X? The old "no one ever got fired for buying IBM". With a pedigree like BaseCamp has, I could justify it by saying it came from them. Just like I justified using Hashicorp's Nomad, even though no one had ever heard of it before I introduced it.