Well, sure, the article here and Meta's, etc.
Even Google started with Perforce originally and only forked/rebuilt when it stopped being able to scale. And did so in a very incremental fashion.
When Google built their alternative to Perforce it wasn't possible for a team of seven to build a new system from scratch and port the entire company over to it in five months.
When Google built their alternative to Perforce it wasn't possible for a team of seven to build a new system from scratch and port the entire company over to it in five months.