I'm 42, and until recently worked for a well known tech company in San Francisco. Most of the time I didn't feel like I was the only person over 30 in the room, but after moving to another city and starting to work on a truly age-diverse did I realize how unbalanced my previous team was.

My current team has a good mix of industry experience and excitement for new technologies, which makes planning both effective and exciting.

Some parts of SV push for diversity and inclusion, but when push comes to shove, firms are quite happy to protect established power structures - shitty managers, retaliatory practices, toxic culture, etc.