So great that it is ready!
On our side, at The Construct we have prepared a web-based system of ROS 2 Crystal so you can start programming for ROS 2 without having to install it in your machine, and use machines other than Linux (like Windows or Mac).
Just point your browser to http://rosds.online and create a new project indicating ROS 2 Crystal as the type of project to work with (see gif below).
This web system includes ros1_bridge and ROS Melodic so you can connect your ROS 2 nodes to Gazebo simulations and other ROS 1 programs of yours. We provide some simulations off-the-shelf.
Hope this helps you consider switching your ROS projects to ROS 2!
