Even after adding a mechanism to limit my deletions/s to 1, I was still getting regular errors from the wandb API. It is now running stably at 0.5 delete/s… ETA > 1 year 
To me, this seems much slower than what wandb sync [...] is capable of doing… I wonder if the rate limiting counts that as just 1 API call, even if it uploads tens of thousands of files. I wonder if that could be my solution? Would wandb sync be able to delete online files if I delete them from a downloaded run locally, then sync the folder?
My testing cannot really proceed, since I am now blocked from even the wandb web console by “rate limit exceeded” error messages. I might wait a few hours (or days) and see if it disappears.