I am pretty sure it's random: there are successful multi-repo companies as well. There are only a handful of companies the success of which compares to Meta or

I am pretty sure it's random: there are successful multi-repo companies as well. There are only a handful of companies the success of which compares to Meta or Alphabet, so statistics do not apply. As a counter point, there is Apple which almost certainly doesn't use monorepo. Or Microsoft.