Both Sapling and Jujutsu are compatible with Git repositories, and there are even settings to have the `.git` directory exposed so that all of your existing tools will be able to run Git commands, show hunk changes in the gutter, etc. For all intents and purposes, you can use them in place of or alongside Git, and none of your colleagues will really need to know. This is a significant advantage over competing non-Git systems, and one of the major selling points that incentivize people to even try it at all.

If it means anything, I have been using Git for 15 years and am one of the earliest GitHub users, and I have not regularly used Git for nearly anything, in any job, for over ~1.5 years now. (Disclosure: I am also one of the Jujutsu developers though, so take that for what it is.)