Are you saying that Zephyr is Rocket? I didn't see anything in the press release saying that, and I didn't see anything on the web site saying that (admittedly, I only spent a few minutes looking...).
If it is Rocket, is it a product that couldn't get traction so now they are giving it away?
Here's the statement from Wind River:[1] "Wind River contributed the Rocket kernel to Zephyr who brings together industry leaders in software and hardware to build an RTOS for IoT." There will still be a proprietary version of Rocket, which is the same kernel but also has components for connecting to Wind River's "App Cloud", which seems to be a hosted IDE. The Zephyr project offers only command line build tools under Linux.
If it is Rocket, is it a product that couldn't get traction so now they are giving it away?