Same here. The CI is easy to use and makes sense, though it lacks some features - for instance being able to automatically run manual jobs as soon as their predecessors complete. Now I have to wait (!) and then click so the manual job starts...
But all in all, good product, I hope they succeed!
I think GP means that you know that for this one pipeline related to commit X you want manual step Y to proceed once previous steps are ok, and you know it right now, so instead of waiting for previous steps to complete you want to trigger the step in a delayed fashion. Kind of like "merge this as soon as tests pass" on MRs.
But all in all, good product, I hope they succeed!