Depending on where you are based, maybe the companies tend to cater to a younger set of developers - few people in their 40s and 50s only have 8-10 years of exp

Depending on where you are based, maybe the companies tend to cater to a younger set of developers - few people in their 40s and 50s only have 8-10 years of experience. There are a lot of cases of ageism - it's not explicit but shows in "cultural fit", etc. All that said, I know older people at companies like Microsoft, Salesforce, even smaller startups, etc.