The Save Asset node is there for me in 4.24 when working with an Editor Utility Widget.
My problem is that I don’t actually want to save the asset after modifications, I just want to mark it as modified so that the user can choose to save the changes (or not) later.
I could just force-save like you’re suggesting, but it annoys me because it breaks the usual flow of the editor where you expect to be able to change something, and then close the editor without saving if you did something wrong.