I think it’s a fact that PRs from outside contributors delay too long, waiting attention for months. I hope this can be addressed with new team members in core team we expect soon.
But for the adapter solution for bulk-email sending, I couldn’t see any reasonable attempt. Recently someone created -tons of- PRs with AI. I tried to review one of them but it was difficult. I just gave a small feedback and all PRs renewed completely as the response. 