[vp8989]

Agreed. There is also a natural disincentive here to optimize the architecture for "team-based flow". As a product engineer, you often get promoted for doing projects that essentially cope with a sub-optimal architecture. If you improve the architecture, there is less promotion fodder for the next person to get to these levels. In fact, I have myself literally been promoted for the former and NOT promoted for the latter.

Note that I am referring to product engineers. Platform/infra engineers necessarily have to work cross-team. And of course some "product" projects should be cross-team ... but if most or all of your product engineering projects are cross-team that is a huge red flag.