Telegraf is still very much alive and well. With v3, we realized the scope of what we were trying to do in v2 was simply too large. We're putting our focus back on the core of the database. Having an embedded VM (it'll be either Python or Javascript) will eliminate the need for Kapacitor in the stack, which had its own programming language and execution engine.

Ultimately, we're trying to narrow the scope of what we're developing and letting other tools that people already know and use have first class placement in the InfluxDB stack.