Their biggest problems seemed to just stem from their arbitrary choice to use subdomains instead of subdirectories. If they just put everything on the same doma

Their biggest problems seemed to just stem from their arbitrary choice to use subdomains instead of subdirectories. If they just put everything on the same domain (/sites/stackoverflow, /sites/superuser, etc.) then they would literally just need 1 certificate for everything, no third-level-wildcard nonsense. Not sure what this decision to have a gazillion different domains has gained them honestly. Reddit clearly manages to work that way.