Reading is my only hobby right now (I'm able to fit it in around kids) so I aim for 3-4 books a month. Most of what I read is non-fiction, but technical books take a long time to finish so I'd say I finish ~10 technical books a year.

I won't say I remember everything I read, but I highly recommend reading as much as possible. My career has been on an upswing the past few years and I have to think reading more has been a contributing factor.

Reading has been particularly helpful at my current job where I don't have any mentors or more senior people to learn from, books have helped fill at least some of that gap.

Context: I am a software engineer / architect with 8 years full time dev experience.