For a while, he released an update every couple of months. Then covid and some personal problems hit him and he was absent without any notice for about 8 months. Then he came back, but he is (logically) still struggling to keep to his schedule. He first said he wanted to release the next update by the end of the year, but those who follow his progress carefully (yours truly included) immediately saw that this was unlikely to happen. Now it's set for release around February. We'll see if he makes that, but it's a more realistic date at least.