1. I would like to know whether ISPConfig will keep using certbot (so far still the official LE client) for another 3-5 years time or will drop it anytime sooner, since acme.sh is now ISPConfig official LE client? 2. If former, would it be appropriate to propose ISPConfig to add a monitor script using certbot renew dry-run command to show whether there is faulty domain that may cause renewal failure? I think this will benefit admin in monitoring his ISPConfig server. I noted that acme.sh has no equivalent to dry-run though it has test feature which is deployable rather than simply checking like dry-run.