[curtisblaine]

Nobody says that React is great (also) because it's industry standard. If you pick up a React codebase you instantly understand how a component renders, where its state is, what its effects are, which components render that component etc. If it's React with a decent linter configuration, it's even easier. With a custom framework, on the other hand, you're at the mercy of who invented it. You have to find where state is, you have to trace where the state is "teleported" via broadcast, you have to understand where side effects are invoked etc. If the custom framework is as good as React, I'd still choose React just because it's a de factor standard.