I suppose the question contains everything…
When can we expect the stable release of v6? I’m currently waiting to start my new project but was holding off until v6 releases.
I believe the core team has said this year but they haven’t given any specific date as of yet. The RC is out so no breaking changes will be made, only bug fixes. Since you are just creating a project, I would say start with v6 and hopefully by the time you are ready to go to production it should be released.