I am not saying they treat every other team as a third party. I am saying they treat the code itself as a black box with well defined interfaces. They aren’t reaching in to another services data store to retrieve information.

I haven’t mentioned it 5 times already so you can be pretty sure I haven’t. I know too many people that have worked there to ever make that mistake.

But more importantly, have you worked there in the last decade?

And before that I worked at 4 product companies when new to the company managers /directors/CTOs needed someone to bring in best practices and build and teach teams.

I honestly wonder what type of “big ball of mud” implementations (https://blog.codinghorror.com/the-big-ball-of-mud-and-other-...) you have had to deal with that weren’t properly componentized and covered by tests.