catfood's point about a 2nd edition is worth unpacking:

The syscall ABI itself is remarkably stable, backward compact is practically Linux's religion, but the conceptual model has shifted substantially.

Namespaces and cgroups went from obscure subsystems to the foundational abstraction containers run on.

io_uring rewrote the async I/O model.

eBPF changed how you think about observability and policy enforcement.