The technology industry is the only one I am aware of where white men experience extremely significant discrimination after the age of 40-45 (and in some places much younger).
Yeah, to some extent age-related discrimination occurs in every field. But nothing, nothing like in the tech industry. In some geographic areas and fields in the tech industry, if you are beyond 30, you are over the hill. If you are older than 35, you are a doddering, senescent incompetent, and if you dare pass 40, you are dead.
Your actual skills, abilities and experience don’t matter at all; nor the fact that you are much better, faster and more knowledgeable than your younger peers. It’s a religious belief that management likes and condones because younger people are easier to exploit and demand less money.