Yes, but you can have an infinite number of progressive valve timings on one shaft because the shaft has an infinite number of degrees to slide upon. For each infinitely small point on the camshaft there is a slightly different profile.

Your last post just made it seem like all SOHC cars will explode if they drive up a mountain. So tell me how this Crossfire you drive alters its valve timing for multiple conditions, if you don't mind.

The ECU takes care of intake volume. That would alter when ... I believe it's called Atmosphere Density, not D.A. ... changes because the amount per part of oxygen would become more or less dense. But valve timing and overlap is directly related to RPM value and nothing else. If valves were independent of engine cycles then the valves would collide with the cylinder head. The valves don't change, just like the engine RPM doesn't change, when elevation or humidity or oxygen levels change.