>>412365267
>I meant stable as in the trackers would move around less
exactly that is the thing about any IMU based trackers (basically any stationless solution so far).
It is not about accuracy, it is about the trackers not being able to tell the "position" in 3D space.
They only estimate it, based on rotation and movement vectors.

Imagine walking around blind and estimating your position in a room, based on the steps you took. The turn around, and estimate where the position is you were at the beginning, then walk back.
You might have found out that you are not standing at the exact same location. Could be only a few cm off, could be a whole meter off. That is essentiall what IMU based tracking does: It does not know the room, it just estimates how fast and in which direktion a tracker is moving.
With stations you do have information about the 3D space. You actually know where the tracker is in 3D space and therefor will have no (or only wery few) drifting issues. Those are mostly introduced because of obscuring the tracker.