[WaT] Do they have all of them?

Major spoilers for WaT up to nearly the end of the book, so please avoid this post if you haven't finished WaT yet.

Can Nightblood grant its wielder all the Surges? Nightblood shows the ability to not only create a bond to Kaladin to siphon Stormlight like a Bondsmith might, but also gives Szeth his lashings back. Does this mean that Nightblood can give its wielder access to more Surges? Even all of them at the same time? If so, why didn't Szeth use more Surges in his fight against the other Honorbearers? (Unless I missed that.)

If Nightblood can grant access to all the Surges, I'm extremely interested in seeing if we'll see somebody else wield the sword in Stormlight 6 and beyond and use multiple Surges. I assume Szeth won't be fighting with Nightblood anymore since he lost his arm, so Nightblood could end up in someone else's hands on the front lines of the conflict that we all know is coming.

I'd like to hear other people's thoughts on this, or to hear if I've missed anything.