Developers are trying their best to get it to Knockturn as fast as possible. There's TONS of plugins incapable of 1.9, pls textures, physics, and much more.
In all seriousness though, it is getting done slowly but surely, although it will likely take some time still, be assured we are putting in lots of effort to make it worth the wait though.
The fun problem is that we also have lives. Whilst I've done some a lot of extensive updates, created new ways to enjoy the game. That being said we have massive plans such as the new overhaul of permissions, an alternative to sign shop (all custom) it's just going to take a while while most of us are on break! Be patient my lovelies it's coming!