What was the most beautiful home network setup you ever seen (yours is ok to brag about too)

From security standpoint, what was the most elegant and thought-through setup you ever seen on a home network? Perhaps it was yours or someone else's -- both ok to talk about.

Any aspects can be considered: General robustness, risk mitigation (as in running public webservices without ending up in a bad place), clever approaches to hard problems.

Trying to take advantage of this as a sort of a case study for personal education how to harden a home network properly …

can cybersecurity general home home network mitigation network risk risk mitigation robustness security thought