Just isn't really a replacement for make outside of the "simple command/task runner". Make is really a lot more powerful and has things like files system driven dependency handling.
Of course that is the whole point of just, to be simpler and more focused tool because a task runner is what people commonly want and the bloat/complexity of make is more of hindrance. This is clearly mentioned in the readme too
> just has a ton of useful features, and many improvements over make:
> • just is a command runner, not a build system, so it avoids much of make's complexity and idiosyncrasies. No need for .PHONY recipes!
