As mentioned in referenced post, there is no ETA, but we are talking weeks maybe few months.
More info will come soon.
But there will be a “catch”. New system will be not backwards compatible with old, due to many complicated reasons, and it wont be possible to technically auto-migrate.
So we will be enabling Scripts 2.0 as a project setting, which will be only available for new projects, so our users can try and experience new system. But migration of old projects will require a bit of manual code-editing by developers of a project. This UI in Editor for migration will come a bit later.
More info on features will come as separate post.
Look for this topic: [FINISHED] Scripts 2.0