Yes all these are positives in theory, but in my 5 years of supporting and maintaining monorepos, I've mostly been inundated with incredibly degraded developer

Yes all these are positives in theory, but in my 5 years of supporting and maintaining monorepos, I've mostly been inundated with incredibly degraded developer experience and hair-pulling CI hacks. I am convinced that the monorepo (a single repository to store code for all of the organization's microservices) is something google concocted to keep their 250+ infra and devops engineers very busy.