It depends on how you are and what job you find. I was hassled once for changing my career direction to development in my late 30s. I wasn't guided or well-groomed at any point in my life, I had to work any job to survive so I didn't fulfill my career goal dreams until then. The worst part of the career is inability to relax, constant anxiety as they push people pretty hard. That's where your personality comes into play. I'm too responsible and that's what they're looking for. They don't care about you. It's a huge benefit to be able to just do a job and come home. In summary, if you work long hours for free, you'll make it in this industry at 51 or 71. That's what they're looking for after all the smoke and mirrors.
It sounded slightly negative in a way, but my point is, all this talk on here is nonsense. They want workers and there's a dearth of people that can write code at all. If you're smart enough to get your compsci degree at 40+, your success in the industry is guaranteed especially if you put in the hours. You have nothing to worry about, no consensus of nerds on HN can stop you. If you feel the CS degree didn't fully prepare you for any specific technology, I'd recommend Pluralsight. Most the instructor on there are great.
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