Absolutely this. Some people think silos are bad, but it absolutely works brilliantly in terms of team cohesion. No stepping on toes. Few arguments because everyone is responsible for their own stuff. No nitpicking over irrelevant style preferences. Pride in ownership, self accountability, thoughtful decision making (mostly). All this leads to good working relationships that come in handy when cross-realm issues arise.
Every place that had a great team did it this way.
Every place that had a great team did it this way.