I'm familiar with inetd, but I don't understand your point. Unix is more than a dozen years older than 4.3BSD. Claiming that long lived daemons is somehow anti-Unix is absurd.
My point was that the idea of small, self-contained apps that do one thing, and do it well, was in no way limited to shell programming.
Init and getty are small, self-contained system demons that are part of the O/S rather than application servers inviting long-running, single address-space processes for business logic.
Just ask init or getty.