I'm sure you know this but RSUs are such a fraction of a percent of real world compensation that they might as well round to zero.
For jobs with high compensation, RSUs are such a high part of the compensation that it's often more than the base salary.
This was not my experience working at FAANG. RSU's started out as 30% of my comp and ended up well over 60% by the time I left.
Either way, definitely not "might as well round to zero". I have never worked anywhere where that was the case.