Ask HN: Which programming paradigm does Unreal Engine Blueprints fit

What is the programming term used for creating platforms to program end-user applications?

For example creating blueprints for programming games, scratch for education.

I remember reading an article about how this approach could lead decrease in bug rates, if done in different industries like aviation etc.

What is the term for this? And what is the state of art solutions in this area? Will it ever be mainstream?