Dynamic alignment question

Just wondering, but what is the general tradition when it comes to dynamic alignement in a system? Should they all be alligned horizonally as much as possible, or should they follow the flow of the music?

Follow your musical intuition, eye, and what you think will look best and be most clear to the performer. Don’t automatically align everything.

What Dorico does automatically is a reasonable approximation for common practice: dynamics that abut are aligned at the same vertical position above or below the staff, but if there’s a rhythmic gap between the dynamics, then they are no longer aligned at the same vertical position. This is a reasonable rule of thumb, though of course there are exceptions, and as Ian quite rightly points out, the goal must always be clarity for the performer above all other considerations.