Okay, so narrowing down to books that really dig into both AI and VR... 'Neuromancer' is the obvious start, but I feel like its AI is more enigmatic and godlike, the Wintermute/Neuromancer merge, and the cyberspace is this data-visualization heist landscape. It sets the rules, but I'm more interested in stories where the AI feels like a person, or the VR isn't just a heist tool. That's why I'd push 'Snow Crash' higher—the Metaverse is a corporate-owned social space, and the Librarian AI is an actual character with a personality, even if it's an info-dispenser. It treats both concepts as part of the daily fabric, not just plot devices.
Then you have more recent stuff like 'Altered Carbon', where VR takes a backseat to 'stacks' and sleeve-swapping, but the AI hotel, Poe, is a brilliant take—an AI bound by its programming (guest service) becoming a genuine friend and ally, which is a theme I adore. For pure VR-as-existential-horror, 'Permutation City' by Greg Egan is less 'cyberpunk' in the neon-noir sense but absolutely about digital consciousness and simulated realities. The AI theme is baked into the very concept of what a person is.
Honestly, a lot of newer cyberpunk seems to focus on corp politics and body mods, letting the AI/VR stuff fade. I miss when those were the central, weird, philosophical engines. Richard K. Morgan's 'Thirteen' has some cool VR interrogation scenes, but it's not the core. Maybe I need to look at indie presses now.