1.The film’s prescience and AI‑fear – many commenters note how “Colossus” feels eerily relevant to today’s AI anxieties and even discuss adapting the whole trilogy.
“it’ll scare the hell out of you” — aizk
“I would love to see the whole trilogy filmed.” — qsera
2. Retro‑computing nostalgia – several users reminisce about the 1990s Michigan Tech computer‑lab culture that chose Colossus and Guardian as the “preferred machines.”
“Back in the late 90s the Michigan Tech CS labs had 2 preferred machines for students to remote into, Colossus and Guardian.” — jameslars
3. Access & availability hurdles – a practical theme is the difficulty of watching the movie: it’s only on DVD in some regions and not on mainstream VOD services.
“This movie is not available as video‑on‑demand where I live. I could rent it on DVD though. And buy a DVD player.” — cubefox
These three threads capture the most common points of discussion in the Hacker News thread.