You're right, the RPi zero 2's CPU is slower - but that doesn't matter for non-interactive tasks. I don't care that my cloud backup export cron job runs 5 minutes (or hours) longer on the Pi than on a Nuc; I only care it happens daily. For the CPU-/GPU-heavy workloads, the RPi Zero W is works as an orchestrator for the > 10W computer: powering it on and off as needed.