Yes. But it wasn’t just about training the pilots, those systems/sensors should have been present even in the cheaper planes (or the cheaper planes simply shouldn’t have been sold).
It's worse because we literally did all this before. When the stick-shaker came out to help pilots know of impending stall conditions, the second one on the copilot's side was an optional extra! This despite the fact that the copilot is the Pilot Flying quite often in standard practice.