I think it's a matter of perspective. I don't think lawyers would typically view Word or ChangePro as being difficult to use - certainly, trying to get them to

I think it's a matter of perspective. I don't think lawyers would typically view Word or ChangePro as being difficult to use - certainly, trying to get them to learn git would be a significantly greater effort. Outside of tech circles, I think that is true of clients as well. The main problem I run into is people using conflicting diff software (eg, you generate a blackline of two Word documents using ChangePro, but you forget to PDF it before it goes to the other side, so they put through some changes on the blackline document in Word tracked changes). These things can be avoided through sane configuration options. Maybe git is an objectively better solution but even if it is there is a huge local maximum problem.