A couple things off the top of my head: * some folks had to deal with a LOT of submodules back in the day; for instance, it wasn't uncommon to have a dozen+ in

A couple things off the top of my head: * some folks had to deal with a LOT of submodules back in the day; for instance, it wasn't uncommon to have a dozen+ in your "vendor/plugins" directory in a Rails 1.x app. More submodules, more problems * sometimes submodules get used to "decompose a monolith" into a confusing tangle of interdependent repos. Actually changing stuff winds up requiring coordination across multiple repos (and depending on the org, multiple teams) and velocity drops to zero. Eventually somebody declares "submodules SUCK!!!!!one!!!" and fixes things by re-monolithing...