It has noticed. Look at Apple architects, validation, layout, etc engineers moving to Nuvia + Rivos + Google + Amazon + Microsoft + Meta + Intel + Nvidia + AMD + Apple + Qualcomm.
In multiples of tens, I would believe it. Upto a hundred over a couple years? That's a stretch but possible if you count a very wide range of roles. Multiple hundreds as they imply on Reddit? That would be catastrophic to any company, even one as large as Apple. You would certainly see it reflected in their job postings after even a few, let alone hundred+
It's there.