Why Google Stores Billions of Lines of Code in a Single Repository
Please dont do it unless you are google and have built google scale tooling (gforce/big table for code cache)benefits of monorepo* change code once, and everyone gets it at once* all third party dependencies get upgrade at once for the whole companycons (if you are not google)* git checkout takes several minutes X number of devs in the company* git pull takes several minutes X number of dev* people running get fetch as a cron job, screwing up and getting into weird state* even after stringent code reviews, bad code gets checked in and break multiple projects not just your team's project.* your IDE (IntelliJ in my case) stops working because your project has million of files. Require creative tweaks to only include modules you are working on* GUI based git tools like Tower/Git Source dont work as they cant handle such  a large git repoGoogle has solved all the issues i mentioned above so they are clearly an exception to this but for rest of the companies that like to ape google, stay away from monorepo