It's really hard to overstate how much of a sea change git was.
It's very rare that a new piece of software just completely supplants existing solutions as widely and quickly as git did in the version control space.
And all that because the company owning the commercial version control system they had been using free of charge until that point got greedy, and wanted them to start paying for its use.
Their greed literally killed their own business model, and brought us a better versioning system. Bless their greedy heart.
It's very rare that a new piece of software just completely supplants existing solutions as widely and quickly as git did in the version control space.