We came to this conclusion from a different direction - feature implementation teams are focused on subdomains, but defensive teams are spread across the entire

We came to this conclusion from a different direction - feature implementation teams are focused on subdomains, but defensive teams are spread across the entire ecosystem. Additionally, defensive devs have brutal SLAs, and are frequently touching code with no prior exposure to the domain. They got known as "platform vandals" by the feature teams, & we eventually put an end to the separation.