I suspect you’re right. I organize conferences, and about 5 years we ran into similar situations. A speaker would propose a talk and they would put an example t

I suspect you’re right. I organize conferences, and about 5 years we ran into similar situations. A speaker would propose a talk and they would put an example that would assume the audience’ familiarity with jQuery. We’d have to explain to the speaker that half of our audience started doing web development 2-3 years before, and there was a very high chance they started with React and never wrote or read any jQuery-based code. Many talk proposals would almost completely broke down because of that.