They’ve been working on it since they finished the next gen update for 3. That’s about two years now.
They’ve also said they learned their lesson with CP2077, so they aren’t going to give release dates or spend massive amounts on marketing this time around.
They’ve been working on it full time for two years. That’s two years they’ve been working full time on it. The full time development has been in progress for two years. For two years, the developers have been working full time on the game.
Did I mention it’s been in development for two years?
So then don't buy it at launch and wait until it goes on sale. CP2077 ended up in a excellent state. Then you have the bonus of supporting only their fixed products while also not paying full price.