That?s their point - that the only Rider with a ?twofer? base form is Geats, and that the others will just use one by default.

Keep in mind there's also that rumor/leak of an early power up buckle "Fever" that supposedly copies whatever buckle it's paired with: i.e Magnum + "Fever" = both halves being Magnum.

There are a lot of blank sounds in the Driver, so if Fever is real and has its own sounds programmed in, that could easily explain it.

Boost is a limited-use item though, which means everytime Geats uses and loses it, he has to go out in to the field in the next round to find a new one and there's no guarantee somebody else won't just pick it up instead. It's like how Deadheat works for Drive and Mach.

My other counterpoint is that even though pairing other signature Raise Buckles doesn't give unique sounds, they can still be paired. The DGP is a competitive and prestigious scene, so I think the Riders will be willing to use any Buckles they can find as long as they get stronger.

The first point is valid, since we see that Keiwa and Neon both managed to pick up Boost (though Keiwa ended up losing it to Ace).

Doesn't Geats remind you of Sword Art Online?

Well, there hasn't been a monologue at the same level as "How dare you make me care about them?", so not really.

SAO Abridged is something special, innit?

All of current DGP Rider names:

https://www.youtube.com/watch?v=FwFAOXIjYi4

So far it looks like the Desire Driver may be the only Henshin Belt this season? Certainly not seeing anything in the story or elsewhere that would call for any other belts. Kinda nice change of pace after all the Reiwa series having several per series.