Unlike solar, wind has pretty significant construction and material costs which feel hard to diminish with scale. You still need to excavate earth, install giant pylons, enormous magnets, etc.

That being said, anyone who has predicted the future prices of renewable energy seems destined to look a fool.

Yeah, these forecasts are far too long-term, and progress would have to slow down a lot to see such small improvements over such a long time. These are guesses and I'm not at all sure that they are even educated guesses.