A lot of issues with tech systems center around human organizations, not technical limits. Fear of complexity is an obvious one, but so too is limited training
Concrete with embedded thermal mass, buildings as heat sinks, roads that absorb and re-radiate, ground source heat pumps, water pipes as thermal buffers...
As a simple rule; install only the ones you need, and whose failure you would immediately notice. If nobody cares, the numbers provide no value anyway.
You're never really comparing like with like, because the value is realized through avoided costs, not income, and every building plot is slightly different.