[MarkusQ]

Systemic cost.

We could have paper shredders, blenders, toasters, water taps, and so on that just ran all the time, but our utility bills would be ginormous. Same thing for our bodies.

[lokar]

Or the risk of autoimmune disease?

[MarkusQ]

Yep. And probably increased allergies. Possibly decreased fertility. And who knows what else.

[ekianjo]

Yes that's the obvious one