Ask HN: Is 30 too old to start in software engineering or CS?

I read a lot about age bias and the emphasis on youth in the software industry, but I have no real context for it. I'm 25 right now and I graduated from college and am working, but I'm kicking myself for not majoring in CS (especially b/c I was at a school with a great CS program). I took an intro CS class my senior year, loved and excelled in it, and have taught myself quite a bit online. I'm thinking about going back to school so I can have a few years to really dive into all these CS concepts and learn them back and front. That said, I'm nervous about committing to a multi-year degree program if I'm just going to be too old to get hired anywhere. Is 25 even too old to get started? Would 30 be too old? (likely age after another 4 year degree).