You cut that citation conveniently short.
> It was never based on a linkable and reentrant library, but instead on a "Unix" philosophy of chaining together simpler commands, which means that it's difficult to use it in long running processes without fork/exec overhead for everything.
Added it in full. It still squarely falls under "this is for fun/are you seriously doing this for this purpose" territory for me.
git operate on the filesystem level, the unix behavior is just getting buried. You cannot rewrite git into a linkable library and decide it's now not unix. It's entire behavior is unix, which is why it's awesome.