I work for a VERY large tech company here in CA.
At least 1/2 of workers and managers are over 50. Gray beards as far as the eye can see, knocking down substantial salary.
However, a large percentage of new workers come from other countries on H-1B.
Where I work it’s about 90%! Truly sad that they don’t want American full time workers and would rather revolving door these folks year after year.