Speechless.
I wonder, @admins, if it's not the case of closing at least these threads, only born to announce the release of an image, after such a long time, just to avoid to be uselessly prolonged because of such ... messages.
After all, the scope these threads were created for, has already passed away years before and, if really someone needs to open a thread for a real issue, they may always do.
I'd say that after 1 year at the latest since the announcement had been made, you can close such threads.
Maybe, as positive consequence, if people can't really avoid thanking for a 4 y.o. announcement, they might learn to use the "Like" function.