Thank you!
Small but important difference, I didn't say "the game is now about 20-25% finished", I said that the demo "has about 20~25% of the final content"! As in, what's seen by the player ^^
Most of the dev time was spent on solidifying the base systems rather than adding new content. At this point the foundation is very solid and just about final, so adding content will generally be my focus. Progress will go faster from a player's perspective, but it's still definitely a few years off! I also wish I could go faster, for sure.