Whats up with Maneuver in Flight's speed clause?

[Old_Man_Robot]

Maneuver in Flight wrote:

You try a difficult maneuver while flying. Attempt an Acrobatics check. The GM determines what maneuvers are possible, but they rarely allow you to move farther than your fly Speed.

Aerobatics Mastery wrote:

You move with grace in flight and can perform amazing aerial stunts. You gain a +2 circumstance bonus to Acrobatics checks to Maneuver in Flight and can combine two maneuvers into a single action, such as reversing direction while making a steep ascent or descent or hovering in gale-force winds. The DC of the Acrobatics check is equal to the DC of the most difficult maneuver + 5. If you're legendary in Acrobatics, you can combine three such maneuvers into a single action; the DC of the Acrobatics check is equal to the DC of the most difficult maneuver + 10. Regardless of the combination, these maneuvers rarely allow you to move farther than your fly Speed.

"Rarely", as a condition, seems very ambiguous to me.

Under what circumstances may one exceed their fly speed through use of a maneuver?

Can we, for instance, as part of a maneuver, voluntarily stop flying - fall 60ft - catch yourselves - then carry on with whatever our speed would otherwise be?

Is the clause mainly their to help get around edge cases that come up with the ascent and descent rules at various angles of steepness?

[HammerJack]

I think that language is deliberately vague, to set up a situation where you may have a specific monster ability that involves a high speed maneuver, and a little room is left for the GM to allow something specific to work in the moment without defining a list of maneuvers that exceed normal fly speed. I don't see a better category to file this under than "Deliberate Variation."

[Cintra Bristol]

I could also see extreme situations where a higher speed to make sense. Presumably with risk of adverse consequences. "I'm flying within the Eye of Abendego, and I want to maneuver to get carried along by some higher-speed gusts to help me close the distance faster, without completely losing control..."

[Seisho]

I could also imagine a 'manever' where you just let yourself fall and pick up as much speed as possible with that

[Elfteiroh]

All of these, and I would add this might be future proofing in case they do release a specific maneuver that let you move faster.