  We present an updated study on assessing the axes stability of the third
generation of the International Celestial Reference Frame (ICRF3) in terms of
linear drift and scatter based on the extragalactic source position time series
from analyses of archival very long baseline interferometry observations. Our
results show that the axes of the ICRF3 are stable at a level of 10 to 20
microseconds of arc, and it does not degrade after the adoption of the ICRF3
when observations from new networks are included. We also show that the
commonly used method of deriving the position time series (four-step solution)
is robust.
