B&N is pretty up to date in the computer section actually. For example, I normally see No Starch Press "The Rust Programming Language (2nd edition)" and "Rust for Rustaceans" and lots of their python books and some that I was also interested in like "The Art of 64-bit Assembly" and "Understanding the Machine." They also have a lot of security books proportion-wise. But the section is smaller than I like and leans toward the mainstream of course.
What I find however, is nothing like it used to be, at least in certain locations. I'm sure it varies by location but I miss the one closest to Redmond (Microsoft) which (at least when I went there around 2000) had multiple full rows of computer books including highly technical ones that you don't see anymore in person.