Why do you think solar panels and batteries and computers improved so much over the last 20 years? I'm pretty sure it wasn't because people said, "This stuff is

Why do you think solar panels and batteries and computers improved so much over the last 20 years? I'm pretty sure it wasn't because people said, "This stuff isn't very good, so let's not buy any of it and just wait for 20 years to see if it gets better."