Well, in the case of Silksong specifically, an early announcement was all but inevitable, as it was originally a stretch goal that got turned into its own game. Even with their apparent preference towards minimal communication, they had to explain what’s happening if they didn’t want to appear like fraudsters.

Generally, I wouldn’t even be opposed to early announcements, as long as the devs were transparent about the status of the project and made it clear in which capacity the game is currently being worked on.