It's fairly hard to do that in a monorepo world, because (in theory) upstream can't merge anything until downstream tests are passing. Moreover, if you do break

It's fairly hard to do that in a monorepo world, because (in theory) upstream can't merge anything until downstream tests are passing. Moreover, if you do break something (especially out of laziness), you get reprimanded. And if you really wanted, you could still require downstream approval for upstream changes.