I'm not sure anyone invoking "classic Unix" is pining for modem noise or line printers, though that seems to be how you're interpreting it. That’s more a caricature of early computing than what defines the Unix philosophy or what NetBSD preserves.
When I say classic Unix, I really mean "simple software":
- Text-first, scriptable interfaces where tools do one thing well and can be composed
- Human-readable configuration in plain files, no XML or opaque binary blobs
- Predictable, minimal system design where you can understand what’s happening under the hood without chasing abstraction layers
- Manual pages that matter, and a userspace that favors understanding over wizard-driven opacity
- A system that’s BSD-like in spirit: clean, coherent, documented, and built by people who care more about correctness and clarity than flash or trends
This is in contrast to modern Linux distributions where systems are often a tangled mess of systemd units, layers of more or less obscure daemons and processes, unpredictable behaviors, and YAML/JSON/XML-based abstractions that sit between you and the actual system.
So no, I'm not glorifying the past or pretending users in 2025 would enjoy a serial terminal setup from 1984. I’m saying that a clean, simple, consistent, modular Unix, in the traditional sense, is still valuable and NetBSD is one of the few OSes that still embodies that ethos.