Philosophically I think the monorepo is better. However it is my experience that most commonly available dev tooling assumes multi-repo setups and that ends up

Philosophically I think the monorepo is better. However it is my experience that most commonly available dev tooling assumes multi-repo setups and that ends up requiring you to write a lot more tooling and glue for CI/CD than you might want to be doing. Monrepos can encourage a lot of good practices and can provide some pretty large benefits which is why many large engineering orgs gravitate to them. But most of those orgs have the capacity to absorb the tooling costs they bring as well.