For my previous use cases, it's ideal for dynamically created subdomains of a web application. If I know ahead of time, it's easy to grab a cert for any subdomain. However if a user is creating subdomains for a custom site or something similar, it's much nicer/easier to have the wildcard cert.

Lots of services create dynamic subdomains in the form of "username.domain.com". To offer SSL on those domains without a wildcard certificate, you'd need to obtain a new certificate and a new IPv4 address every time a user signs up. You also need to update configuration and restart the web server process.