Nobody knows. But the more interesting question is how many of them intend to return to flying. Many past their mid-50s don't, as per my observations. Many much younger ones already wanted to pull out and this crisis was the final straw which broke the camel's back. Many who are not redundant will retire or pull out in the next 3 years or so. So, speaking of experienced pilots, the number of applicants for jobs will not be equal to the number of those made redundant. But by how many?