Most opinions about monorepos conflate monocultures in source control with monocultures in build systems or workflows. Those two considerations are technically

Most opinions about monorepos conflate monocultures in source control with monocultures in build systems or workflows. Those two considerations are technically orthogonal. You can have one big repo with N build systems (like a node app and a python app in the same repo with disjoint workflows). And you can have N repos that have a common build system (each can combine into one big build with cloning and/or submoduling). I find most of these conversations are more interesting when people decide to make that distinction.