Gitlab-runner Windows CMD shell executor deprecated, but not scheduled for removal now?

Gitlab Runner (12.6?) was giving a deprecation warning about the Windows CMD shell executor, and indicating it was going to be removed in GitLab 13.0. As best as I can tell from here:
it is still deprecated (and no longer the default for new gitlab-runner installs), but also still available in 13.x, and there is no longer a specific plan to remove it?

I just wanted to confirm that if we upgrade our 12.x GitLab Core server and our Windows runner to 13.x, our existing simple CMD-based CI jobs will continue to work as they do now?

To avoid unpleasant surprises, I would recommend you to put your CMD commands into a batch file and run it with cmd /c. Thus it will run even if the shell is changed to PowerShell.