How common and fast is aetheryte teleporting?

[Iscah]

It's implied that being able to use aetherytes at all isn't a very common thing as it was mentioned that only a small unit of Doman soldiers was able to offer immediate support against the Imperial counterstrike at the Ghimlyt Dark, the rest needing to take the traditional route.

Assuming characters are bound by the same teleportation rules as players, that issue wouldn't have been due to a general inability to teleport, but the specific restriction that you need to have attuned to your destination aetheryte. So only the small number of soldiers who had previously traveled to Eorzea would be able to teleport back there.

There might also be additional "realistic" rules about aetherial strength/skill that could prevent some from traveling such a long distance, even if they can travel locally.

[Daralii]

Assuming characters are bound by the same teleportation rules as players, that issue wouldn't have been due to a general inability to teleport, but the specific restriction that you need to have attuned to your destination aetheryte. So only the small number of soldiers who had previously traveled to Eorzea would be able to teleport back there.

There might also be additional "realistic" rules about aetherial strength/skill that could prevent some from traveling such a long distance, even if they can travel locally.

There was a comment when you met up with the Doman Resistance that they smashed the aetheryte at their base I can't remember the name of that, when the Garleans were trying to stamp out the last traces of the rebellion, they were trying to force unattuned conscripts through. I forget if it was mentioned what happened to them.

[Jandor]

There was a comment when you met up with the Doman Resistance that they smashed the aetheryte at their base I can't remember the name of that, when the Garleans were trying to stamp out the last traces of the rebellion, they were trying to force unattuned conscripts through. I forget if it was mentioned what happened to them.

A lot of them died I guess.

It's possible to teleport to an unattuned aetheryte, same as it's possible to drive down a busy road with your eyes shut and the music turned up.
Got a vague idea of where you're going, there's a chance you'll make it to the end intact, 100% not recommended but you might give it a go if someone held a gun to your head.

[KageTokage]

There was a comment when you met up with the Doman Resistance that they smashed the aetheryte at their base I can't remember the name of that, when the Garleans were trying to stamp out the last traces of the rebellion, they were trying to force unattuned conscripts through. I forget if it was mentioned what happened to them.

I think they mentioned in the quests surrounding Shiva that trying to travel to an unattuned aetheryte poses the risk of getting lost in the Aetherial Sea, which is about as good as being dead (Unless you're exceptionally skilled and have people able to bail you out like Y'shtola did).

Losing access to the intended destination during transit would presumably ensure such a fate.

[Wyssahtyn]

There was a comment when you met up with the Doman Resistance that they smashed the aetheryte at their base I can't remember the name of that, when the Garleans were trying to stamp out the last traces of the rebellion, they were trying to force unattuned conscripts through. I forget if it was mentioned what happened to them.

They didn't say that they were doing it, they said that there was a fear that they would.