Any new game will bring in lots of new players to a forum for a time and pull a percent from older games, that's why.
Same thing happens when a married man thinks he's found a younger more attractive woman. She may look good on the outside and he enjoys the newness of it. After awhile he realizes he realizes she shallow and empty and lacks the inner beauty of his long time wife. Thus he returns to promised love, hoping that no one will ever know.
The many at the SH4 forum didn't fall for the pretty package. This forum is just full of a bunch of adulterers..