The paper is conducting a cross-device and cross-shot analysis of disruption precursors using the DECAF code. In particular, occurrence of disruptions explored via detection of a plasma current quench and exploration of disruptive event chains, constituted by plasma current and vertical position abnormalities, was reported for in total 7 full device-years of operation pairs of 3 machines (NSTX-U, MAST-U and KSTAR). It was shown that the disruption occurrence captured through theIp quench depended not only on details of the plasma state, but also on (device-dependent) technical details of the shot exit scenario. A year-to-year change in main disruption triggers and even a reduction of the disruptivity rate, bound with device and operation upgrades, were reported. Particular trigger instances of disruptive event chains (and the full chains, when applicable) were shown to occupy predominantly distinct parts of the operation space diagrams, in accordance with a prior expectation. Plasma elongation was identified as an important factor influencing triggers.