  During the last years, much attention has been paid to the astrometric
implications of the galactic aberration in proper motions (GA). This effect
causes systematic errors in astrometric measurements at a microarcsecond level.
Some authors consider it so serious that it requires redefinition of the
celestial reference system (CRF). We argue that such attention to the GA is too
much exaggerated. It is just a small astrometric correction that must be taken
into account during highly accurate astrometric and geodetic data processing.
The accuracy of this correction depends on accuracy of the Galactic rotation
parameters and, for most application, on the accuracy of the rotation matrix
between Galactic and equatorial systems. Our analysis has shown that our today
knowledge of these two factors is sufficient to compute the GA correction with
accuracy of better than 10%. The remaining effect at a level of few tenths
microarcsecond/yr is negligible nowadays. Another consequence of introducing
the GA correction is necessity to return to classical astrometric modeling of
the VLBI-derived extragalactic radio source position by the linear trend model.
Changing the current paradigm of VLBI-derived CRF based on assumption of zero
motion of radio sources to classical one leads to bias in the radio source
positions up to several tens microarcseconds for catalog at epoch J2000.0.
