The general idea here is that jj has fewer and more orthogonal concepts than git. This makes it more regular, which is what I mean by "easy."
So for example, there is no index as a separate concept. But if you like to stage changes, you can accomplish this through a workflow, rather than a separate feature. This makes various things less complex: the equivalent of git reset doesn't need --hard, --soft, --mixed, because the index isn't a separate concept: it's just a commit. This also makes it more powerful: you can use any command that works on commits on your index.
The general idea here is that jj has fewer and more orthogonal concepts than git. This makes it more regular, which is what I mean by "easy."
So for example, there is no index as a separate concept. But if you like to stage changes, you can accomplish this through a workflow, rather than a separate feature. This makes various things less complex: the equivalent of git reset doesn't need --hard, --soft, --mixed, because the index isn't a separate concept: it's just a commit. This also makes it more powerful: you can use any command that works on commits on your index.
This is repeated across jj's design in general.