On our server some sites use SSL, some don't, some are Drupal sites, some are not. All the sites are served at the same IP address and the non-Drupal sites each use their own certificates (or none) per their Apache configuration.
With Aegir 2 it was only possible to have: one IP Address for non-SSL sites and one IP address per each SSL Drupal site which would exhaust our purchased IP addresses.
Does Aegir 3 allow multiple SSL sites / certificates on the same IP address?