Pretty sure this only refers to publicly trusted certs. What percentage of public certs are still being manually managed?

I've been in the cert automation industry for 8 years (https://certifytheweb.com) and I do still hear of manual work going on, but the majority of stuff can be automated.

For stuff that genuinely cannot be automated (are you sure you're sure) these become monthly maintenance tasks, something cert management tools are also now starting to help with.

We're planning to add tracking tasks for manual deployments to Certify Management Hub shortly (https://docs.certifytheweb.com/docs/hub/), for those few remaining items that need manual intervention.