Hard to say
In a way, it’s been in development since Euro Reakt (about eight years ago) since some of the drum engines started life as modules there. I started more full-time development on the plugin itself shortly before Syntakt came out. It probably would have been out a lot sooner but Syntakt definitely changed a lot of personal goals that I had for the project.
Richard sent me this video a few hours ago and I couldn’t believe how much mileage he’s gotten out of this so far: